Thumper

Everyone creates a hand signal (it could also have a sound effect associated). Go around in a circle, and make sure everyone sees everyone else's signal. Now everyone starts thumping on the table or floor. One person will start by doing their hand signal, and then someone else's signal. The person whose signal they did must do their signal and then someone else'. This continues until someone takes too long, or messes up a signal. This person must drink.