Well if you go to the center of Ul'dah theres tons of places to sit. It was obviously designed to be where people meet but due to the shout range or whatever reason I don't think anyone hangs out there, at least on my server. ATM everyone is standing around in the sidewalks which understandably don't have places to sit.

Limsa has that one area with the fountain and Gridania's shopping area has a lot of sitting places, not to mention the waterfall area and the theater.