For those that don't get the joke ..

the movie really isn't about the joke. In fact this really isn't a movie. It's more of a documentary. It's about the telling of the joke. It's not a funny joke. It's only a chance for comedians to tell it to other comedians.

If you never heard of an aristocrat then you definitely won't get it. Basically an aristocrat is a person of very high class and/or uppity. Usually an aristocrat would find themselves avoiding doing anything work related that they could just pay someone else to do for them. The last thing the acting group should call themselves is aristocrats.