If you want to try something a little more on the British side of humor, you might consider Monty Python's "Argument Department" routine. or maybe even "Dead Parrot" or "Cheese Shop". It's pretty amazing, the fact that we'll stand there and listend to the whole routine, and laugh out loud, even though we've all heard the routines a dozen times before. It just seems so funny to think of two skeletons arguing...
Mixing up the routines that are played will help keep it fresh for both the workers and the guests, if you have long lines to get in, hearing the same stuff over and over again gets really old, really fast.
FontGeek