Rock Paper Drink
4 or More
All players stand in a circle, and two players start by playing Rock Paper Scissors.Whoever loses has to take a drink and then challenge the next player in the circle. Every time you lose you take a drink, if you lose to everyone in the circle you have to finish you drink.
If two players tie, they go again and you add one drink for every tie. e.g. If two players tied 4 times before someone lost, the loser would have to take 5 drinks.