Want to kill an evening, several thousand brain cells, and study for that calculus final? Try the convergence drinking game! The rules are simple: you pick a sequence of numbers xn and a point xo to which you think the sequence converges. Then the player picks an epsilon greater than zero and if |xn-xo| is less than epsilon, take a shot, and then your opponent picks a smaller epsilon. If |xn-xo| is less then epsilon, take a shot, else take 3 shots, pick a new sequence and the game restarts.