Two players across from eachother, each with 3 to 5 shots lined up in front of them. Fill with liquor of choice, but the stakes get higher the cheaper the liquor is. Have one chaser sitting in between the two of you. Each player has a hand behind their back. Take the shots, and when every single one is empty reach for the chaser. Whoever loses doesn't get a chaser until the winner willingly gives it away. Its pretty cutthroat. One or two games is PROBABLY enough.