A strange neighbor has turned to me in the theatre, and proposed to play cards to define, who will go for the beer, to make the performance "more dynamic"... He has proposed the easy game, based on Black Jack rules: Both players take cards from the deck, till one of them gets the 21 (Black Jack). If the cards sum exceeds 21 points, player may discard any card - the new card from the deck replaces the discarded card. And so on... The player, who first receives 21 points - wins the set. The loser runs for the beer.