Sixty Seconds Drinking Game
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 players number, s/he drinks, that simple, eh.
Game ends when either: no more beer, nobody conscious, clock broken, or players find a real life.