A game of math and drinking. You'll need a deck of cards, people, and beer. The game follows the same premise as BlackJack, but with some important variations.
The object of the game is to get as close to 31 points in your hand without going over. Aces are 11, all face cards are 10 points, and all other cards are face value.
Each player is dealt three cards, two face-down, and one face-up. The play rotates, like in BlackJack, for additional cards. At any point in the game, if you think you have a high hand, 28 points or so, you can "knock," which means everyone else has one last draw to add to their hand. After everyone plays their last card, the hands are laid down and the person with the lowest point total has to drink an entire beer before they lose again in an ensuing hand. If the person who knocked has the lowest point total, that player must also drink an additional penalty beer for poor play.
If someone does not finish their beer before losing again, they must drink yet another penalty beer. Finally, anytime someone has a total of 31 in their hand, they immediately place their cards down and everyone else is a loser. Fast play can be a killer.