My favorite drinking game is/was Mexican Trivial Pursuit. Whenever you miss a question for a biscuit (or piece of pie) you have to take a healthy swig from a bottle of Mescal. The winner is either the person with all their biscuits or the person that eats the worm, whichever comes first. After the first few misses, it doesn't really matter anymore if anyone wins unless you're really squeamish about eating worms.