This game is better played in teams, but can be played 1v1.
Flip a coin to decide who goes first. First team picks a card, one draws and the others guess what it is. The longer the other players take to guess the drawing the longer that everyone will be drinking for. Each guessing player must be constantly drinking and can only stop to guess. Once someone has guessed correctly the team can stop drinking. If the two minutes to draw runs out without anyone getting the correct answer, everyone must finish their drinks.
This continues until one team guesses, three pictures correctly. The losing team does a shot, winners choice.