Down here In St Pete Beach, we generally only do Rocky. We have done Shock Treatment a few times in the past. We have sister Casts (which are incidently a lot of our cast members) that do Repo! (though they once did Little Shop of Horrors) and Dr Horrible's Sing A Long Blog.
My cast actually started as a Repo cast (I mainly play GENtern and Pavi, thus the quote in my sig), and added Rocky a year later. We have kicked around the idea of doing other movies, but the ones we want the most, we can't get the rights for. Le sadface!
Reading this thread makes me want to kick up the idea train again, though!