Fat Cat
There's always something going on at the Fat Cat - live music, ping pong, board games, pool shuffleboard tables, and cheap beer and wine (no hard alcohol). On nights where there's live music they charge a $3 cover fee, which isn't that bad especially considering how cheap the drinks are. Watch out - the ping pong tournaments get pretty intense (step aside amateurs...).
Fat Cat, 75 Christopher Street, 212-675-6056
[Photo via @la_cowan]