You seem to be heading in one direction. You are on a linear path. I have seen people in the taverns, but no they generally arn't hanging around. Tey are probably exploring the new caves, finding the new monster thigny, killing somthing etc.
EG: They are playing the game
What you seem to be looking for is a 3D chatroom. Well maybe that is a little harsh, but what you are not doing is looking at what people are doing whilst they are playing. I have stopped by and gotten into random roleplay in the plazaa, roleplayed whilst getting some ore from another player to complete a quest, and other people around the forges joined in! There were random comments flying around just based on a little transaction which started off as an OOC "how do I get stock if I can't make it" From that I learn't Where to get the stock book and the necissary stock to complete the little quest. All in roleplayed fashion.
I agree that RP in Brado's or Kada's etc are fun. But if there is somthing better to do than sit around in a tavern all day, then, by all that's hot in hell, people will do it. And they incoporate RP into that!