Needed-one deck of cards, and alcohol-mixed or shots 
 
Two players at a time, but the more players, the funner. Two players, take one card each from the deck. they lick the back (the decorated side, not the number) and without looking at it, stick it to their forehead. the two players look at the others card, and decide if there’s is higher or lower. whoever is wrong takes a drink, or shot.
(Thanks Tj!)