Red and Black

When drinking mass quantities it is nice to be playing a game where a lot of thinking is not necessary. This game requires almost no thinking at all and therefore is the perfect drinking game.

Rules:

The cards are placed in a pile and players guess if the card will be black or red. If they are correct, they give out that number of sips. If they are wrong, they take that number of sips. Can't get any simpler than that.