A group of at least 4 or 5 people, sit around a table. Each person gets 1 shot glass, and enough beer to last you through the night. In the middle of the table there is a bottle of something hard.
Each person drinks their beer at about the same speed (preferably fast). If anyone passes out each remaining player does 1 shot of hard stuff each; anyone vomits, 2 shots each; and if anyone falls over, 3 shots each. The person who does any of the above has to sit out for the rest of the game. Me and my buddies played this and we all were wasted in 30-40 minutes.