24 shot glasses or cups
Checkerboard (regular size for shots, custom size for cups)
2 different colors of alcohol or beer
Everyone knows how to play checkers, so this should be easy. Place the shot glasses in the appropriate squares and fill each teams' pieces with one of the two alcohols (different color/style glasses may be used instead of different alcohols). Use half shots for alcohol, and full ones for beer.
The rules are the same as regular checkers except if you lose a piece, you must drink the shot. When you are kinged, just stack a glass under the king. The loser has to finish the remaining shots from the victor.