A popular game with potential for very high buzz factor. 
Supplies: people, beer, and a deck of cards. 

Everyone sits around a table, one player is the dealer as well as a participant. Each player is dealt four cards face up, to be kept on the table in front of that player.

The dealer then starts 'up the river' by turning over the first card, each player
with the same card in front of him/her (suit doesn't matter), must take one drink.

If the person has more than one of the same card, he/she drinks for each card.

The dealer then turns over the next card. Same thing, except this time it is two drinks. The next deal is three drinks, and the the last is four drinks.

After the fourth card, the dealer returns 'down the river' by dealing the next card on top of the fourth card dealt. Players with matching cards now GIVE four drinks away in any combination; four to one player, or maybe one drink to four different players. Same situation of the player has more than one of the same card; the player gives drinks for each card.

The dealer continues back 'down the river' by dealing the next card on top of the third card dealt. This time players give three drinks for each matching card. The next card is a give of two drinks, and the last card is a give of one drink.

After all the cards are dealt, shuffle the cards and play again.