Is there an add-on for iTunes that will work like a jukebox

I plan to throw a couple parties this summer and I am looking for an add-on or software that will allow iTunes to work like a jukebox, so my guests can choose the songs they want to hear on my Macbook Air and the songs will que up and play in the order they were chosen. Just like a jukebox. Does anyone know if there is an add-on or software that will do this?

There's a built-in function in iTunes that does this called iTunes DJ.

Apple - iTunes - Learn about the features of iTunes 10.

(about halfway down the page)