A very good game for a laugh - will get you drunk very quickly if you're unlucky, and will cost you nothing if you're lucky. Ideally, the more the merrier.
A coin is flipped and passed around the group, keeping count of each time it lands on heads. The person who gets the third head has to pick the most vile shot they can conceive. The person who gets the sixth head has to go and buy the concoction, and the person who gets the ninth head has to down it - usually accompanied by some very entertaining facial expressions.
