We stayed there talking for about two and a half hours, almost until the restaurant closed. (They didn't quite have to kick us out.) It was a pretty quiet night, so we weren't denying them any business or anything. Among other things, I got to ask a lawyer how the law would apply to various super-powers. Ah, geekdom.
It was very nice. Good food and leisurely conversation is a pretty enjoyable combo. One of the better reasons to invent civilization, I'd say.