What you need: Beer, 16 oz. plastic cups, a ping pong ball, and a ping pong table
How to play: Split up into teams and arrange the 10 cups in a pyramid on each end of the table, similar to you would in arrange balls in pool. Fill the cups with beer, and team members take turns throwing ping pong ball into cups on opposite side of table. When a ball lands in a cup on the other side of the table, that team has to drink the beer and remove the cup. When all cups are gone on one team's side, the other teams wins.