A few more to add to the list: AR0103-AR0104 (Splurging Sturgeon), AR0105-AR0107 (Blade and Stars), AR0119-AR0121 (Three Old Kegs), AR0154+AR0171 (nameless tavern in eastern Baldur's Gate), AR0165-AR0166 (nameless tavern in northwestern Baldur's Gate), and AR1306-1307 (nameless tavern in southeastern Baldur's Gate).
Anyway, here's a bunch of info from
Gamebanshee:
AR0103-AR0104: Splurging Sturgeon1st Floor:
Lantanara: A woman who had a dream about you in which you were an iron god who crumbled on his knees. Tells you to be careful as the fate seems to be against you.
Brielbara: You get 1000 Exp. and +1 Reputation for bringing her Yago’s book of curses. If you ask for a payment you get 200 gp. Coran also turns down her offer to live together and stays with you.
Lusselyn: A fighter who obviously got one too many. He is really drunk and if you talk with him 3 times he bets you 100 gp. that you won’t be able to defeat the Mustard Jelly upstairs. When you return he gives you only 60 gp. because he got a bit thirsty while waiting.
2nd Floor:
Mr. Shade: You can bluff your way through the whole conversation (it gets really funny, to be honest) but it leads nowhere. He eventually leaves when you admit that you have no idea what he was talking about. Apparently, if you have the Golden Pantaloons with you (see Friendly Arm Inn for more details) Mr. Shade gives you some useful tips about them.
Mustard Jelly: There is a Mustard Jelly in one of the rooms which you’ll have to kill in order to win your bet with Lusselyn downstairs.
AR0105-AR0107: Blade and Stars1st Floor:
Shaella: A follower of the dead goddess Leira, who used to be the goddess of the mist. She tells you how Cyric murdered her and how Mask betrayed her. There is no real point to it and once she’s done she leaves.
G’Axir the Seer: Asks you to bring him a Sphene Gem in order to predict the future. The gem can be found on the Basilisk at the docks(Southern part of BG). Once you return with the gem you get 1000 Exp. and he tells you a bit about yourself and Candlekeep (nothing of interest, though).
2nd Floor:
Lothander: Once you have obtained the scroll required to remove his geas off Jalantha Mistmyr at the Water Queen’s House(Southern part of BG) you can bring it to Lothander for 1500 Exp. He gives you his “half” of the antidote(barely 1 antidote) and tells you that Marek has the other half. Marek can be found at the Blushing Mermaid inn (North-Eastern part of BG).
3rd Floor:
Reginald “Longtooth” Worthington III: A nobleman who talks a lot but says very little. There is no point to the conversation so you might as well avoid it.
AR0114-AR0115: Blushing Mermaid Inn1st Floor:
Vivienne: Tells you how her husband got killed while plowing his land because of the bad quality of the iron. She then leaves.
Ivanne: Appears in chapter 7. An old dwarf (or gnome) who tells you the circumstance in which Scar was killed if you give him 10 gp. It appears that a doppleganger is to be blamed and as you well know dopplegangers exclusively work for the Iron Throne (and Sarevok, this is).
2nd Floor:
Marek: Marek will be there once you helped Lothander and met him at the Blade and Stars(see South-Eastern part of BG for more details). At the end of the conversation you get 10000 Exp. and a message tells you that you have been cured of the poison. You then have to kill Marek.
AR0116-AR0118: Helm and Cloak InnGorpel Hind, Farluck, Nelik and Turpin: The 4 members of the party known as the Merry Fools. Talking to them triggers the entry of the Maulers of Undermountain(another party of adventurers) so be ready for a fight(and a tough one too!). If you have told Gorpel and his comrades a story about your adventures in the Cloakwood forest he will help you in the upcoming fight.
Gretek, Wilf, Arlin, Caturak, Pargus and Nader: A bunch of psychos who are known as the Maulers of Undermountain. They attack you almost on sight and they are pretty tough. There is 1 melee fighter, 1 archer, 1 cleric, 1 mage, 1 thief and 1 fighter/mage in their group.
2nd Floor, Part A:
Sarah: An emissary from Amn who has been sent to settle the misunderstanding between her nation and Baldur’s Gate, a city of “barbarians” according to her. She is so important that her room is guarded by 2 guards.
2nd Floor, Part B:
Painting: Be careful as the painting is trapped (Fireball spell). Behind it you’ll find the Helm of Balduran (one of the best items in the game). You can then bring it back to Degrodel at location (5) for your reward.
AR0119-AR0121: Three Old Kegs1st Floor:
Bellamy: A halfling who warns you against the crazy paladin Phandalyn if you have evil party members. Phandalyn can be found in the South-Western part of Baldur’s Gate (see that section for more details).
Shep: A commoner who obviously hates adventurers and thinks that they stink. You may be tempted to kill this insolent brat but don’t, else you’ll lose reputation.
Delthyr: If you have talked with him in the Eastern part of Baldur’s Gate you’ll meet him once more on the first floor of this inn. He tells you to follow Rashad, Duke Eltan’s healer, each night when he leaves the Flaming Fist Castle to see where he goes. I didn’t push the investigation further and there is no need to. Rashad is a Greater Doppleganger and you just need to talk with him to make him reveal his identity.
2nd Floor:
Ithtyl: A maid of the Three Old Kegs who wishes you to enjoy your stay. There is no real point to the conversation.
Painting: Behind a painting near the staircase you’ll find the Skull of Kereph, an ancient priest of Tymora who was greatly blessed by his god. One night his brother Ghorak killed him and took his head away because he was too jealous of his brother’s success. Ghorak has been cursed by Tymora ever since and if you take the skull to Agnasia in The Lady’s Hall (Western part of BG) you’ll get a reward.
3rd Floor:
Areana (Noblewoman): She is being blackmailed by a rogue named Cyrdemac because he saw her one night at the Undercellar. She offers you 500 gp. to remove him although you can make her offer you 2000 gp. and then 4000 gp. Cyrdemac can be found at the Elfsong Tavern(Eastern part of BG). Once you have removed him you can come back to Areana for your reward. She admits that she only has 500 gp. on her and that she has offered more(if this is the case) just to make you take the job. You can either agree on these 500 gp. or continue to blackmail Areana yourself every 10 days for a further 500 gp. If you do so, she’ll hire a thug named Tor Lobo to remove you. He’s worth 600 Exp. and carries a bit of gold. You can then continue your blackmailing (if you are evil, this is).
AR1215: Jopalin's TavernYou’ll find a lot of drunk sailors in here, no quests though.
AR0133-AR0126: Low Lantern1st Level:
Lobar: The owner of the place, Lobar wishes you to enjoy your stay. There is a chest in his room which contains 112 gp. and a scroll of Protection from Fire. The other scroll is cursed.
2nd Level:
Desreta and Vay-ya: Two psychos who think that life is not worth living and who invite you to share some entropy pleasures with them. You can either tell them to get lost, in which case they will. If you accept their invitation, be prepared for a fight.
3rd Level:
Yago: The mage who cursed Coran’s daughter. You can kill him for 1400 Exp., a Knave’s Robe and Yago’s Book of Curses. You may also make him hand over the book but it is not the most rewarding solution. Once you have the book bring it back to Brielbara at the Splurging Sturgeon (North-Eastern part of BG) for your reward. Coran also chooses to stay with you if you had him in your party.
AR0154+AR0171: Inn in Eastern district of Baldur's GateNothing happens here, though I was thinking of using this area for a little encounter in the BG1NPC Project.
AR0165-AR0166: Inn in Northwestern district of Baldur's Gate1st Floor:
Connoly Finn: Offers to tell you a story but feels insulted by whatever you say and ends up by saying nothing (which is probably as well).
Borinole Mann: An old man who tells you a story about the Firewine ruins and the Ulcaster school which has no beginning and no ending (and no point either).
AR0705-AR0706: Elfsong Inn1st Floor:-
Brevlik: A cunning gnome collector who wants you to steal the Telescope on display at the Hall of Wonders in the Western part of Baldur’s Gate. He offers you 500 gp. and you can bargain to add one of his magic items to the deal. The best way to steal the telescope is to go to the hall at dusk. You’ll find Alora there and you can either accept to stand watch for her or tell her to get lost, in which case she’ll leave. Once you have the Telescope, bring it to Brevlik for 500 gp., a Wand of Lightning and 5500 Exp.
Husam: If you talked with him at the thieves’ guild you’ll meet him once more here. He offers to tell you more information about the Iron Throne but ends up by suggesting that you visit their headquarters in the Southern part of Baldur’s Gate. He then takes his leave.
2nd Floor:
Cyrdemac: A rogue blackmailing Areana, a noblewoman you can find at the Three Old Kegs (Northern part of BG), because he saw her at the Undercellar. You can kill him for 975 Exp. and a Bastar Sword +1. You can then return to Areana for her reward or take over the blackmailing yourself if you are evil.
Alyth: She is the owner of the establishment and either tells you a bit about the customers or about the reasons why she bought the place. If you talk with her twice, she offers the same services as the Bartender downstairs.
Merchant: One of the merchants you met at the Nashkel carnival has traveled to Baldur’s Gate and offers you his fine collection of waress. You can also buy back anything you sold him in Nashkel, should you be interested.
Also, in BG1NPC Project this is the inn where Alora has been staying, and her first quest will start here.
AR0720: Drakon TavernNothing happens here. BTW if you didn't already know, it can be found in central Baldur's Gate (the area with gambling tents and the fortune teller)
AR0807-AR0808: Inn in Eastern district of Baldur's GateNothing happens here.
AR1109-AR0110: Inn in SW disctrict of BGPhandalyn: A crazy paladin who attacks you if you have any evil party members. He does not become hostile, however, so killing him will cost you reputation points. If you have evil party members, I recommend avoiding to enter in this inn.
AR1306-1307: Inn in Southeastern district of Baldur's Gate1st Floor:
Euric: If you have talked with his mother Nadine(see Central part of BG for more details) you can bring Euric the Amulet of Protection +1 for 1100 Exp. Go back to Nadine then for a further 400 Exp., +1 Rep. and a Necklace of Missiles.
2nd Floor:
Sanadal Gwist: A woman who asks you to find her “dear” brother and cousin Carbos and Shank. If you remember well, they are the first assassins you met in Candlekeep. If you push her on her motives, she admits that in fact they owe her some money and asks you to kill them for it (which you did, heh).