Beer Game: Sixty Seconds|
This is one that is only good for quickly getting sloshed on cheap, nasty beer (the best kind). Required supplies: one analog clock with second hand, lots of beer, people with nothing better to do.
Each person chooses a number (either 1 through 12 or 1 through 60). Whenever the second hand passes a player's number, s/he drinks.
Game ends when either: no more beer, nobody conscious, clock broken, or players find a real life.