Get a shallow pan of water, about 15cm deep with a diameter of about 60cm.
Cut out foam discs which are about 1cm diameter and write a number on the back and place the disc onto the pan of water so that the number is facing down. Each number will refer to a shot glass containing a drink. Have a bunch of shot glasses each with different drinks inside ie one has vodka and another may have whisky. The players may also choose to put some nasty drinks in some of the cups if they so wish. Have about 30 of these glasses, so there should be about 30 round discs floating face down in the water.
The aim of the game would be to stand about 2-3m back away from the pan of water and throw a bottlecap into the pan of water and try and hit the foam discs. For each foam disc that is facing up after each turn, the player goes and drinks those drinks. The players take it in turns to throw and drink. Drinks may be refilled and the discs are placed back face down.
The foam discs will float but the bottlecaps will sink when thrown into the water. This mechanic was used to design this drinking game.
RE: http://comp4431.wordpress.com/2009/08/18/design-idea-wk5-mechanic-driven/
