I was talking with Dawn last night and mentioned that I used to think a shotgun only match wasn't at the top of my todo list but I sure was wrong. Because of the limited range of bird shot we can do so much more with stages.
As rugersol mentioned, if you have a shotgun you can play. It is one of the easier action shooting sports you can get into. It's surprising and humbling when you miss a clay target ten feet away. Dust off those home defense shotguns and come out and play.