Flip Cup
Flip Cup, also known as Boat Racing, is a team based drinking game. It is very similar to a drinking relay race. The two teams stand on both sides of a table, facing one other. In front of each teammate is a cup filled with an arbitrary amount and kind of liquid (often beer). At the start of the race, the first member of each team drinks his or her beverage.
When finished, the cup is placed right side up at the edge of the table, and the person who drank it tries to flip it upside down onto the table. If he or she is not successful on the first try, the cup must be reset each time. Only after the first teammate is done flipping the cup can the next person proceed. Whichever team finishes drinking and flipping all its cups first is the winner.