Fast Eddie's in Fairfax VA is probably not in the running, but I'll mention it because this thread is kinda slow so far. I play in the Thursday night APA 8-ball league, we have 14 teams in 2 divisions that play side-by-side. It's a fun atmosphere, everybody jokes around and takes things easy (no noticeable sand-bagging, nobody sharking, almost no rules arguments), although several of us are very serious about the game (and at least one of us is a pissy, angry loser if plays poorly, not naming names).
-Andrew