Organ Stop Pizza -- one of my favourite places to go when I'm in the Phoenix Metropolitan area.
First off, don't get me started with all the reviews about the pizza -- its average at best and yes, its expensive.
You don't come here for the food -- you come for the entertainment. Watching the professionals that play that monster of a Wurlitzer Theatre Organ is what you're paying to see. The best views and best sounds are on the 2nd floor -- there is no elevator, take the stairs to the left/right. Also, the large wooden pipes in the back throw out some of the deepest bass I've ever heard and felt. Its also funny to watch peoples hair literally get blown around by these pipes.
Again, the pizza isn't the attraction: its just something nice to snack on while you listen to and watch this amazing machine.