When we were young, my parents would take us each summer to see a show at the Melody Tent in Hyannis....I remember seeing Man of LaMancha there. I think my parents saw Mame there. We weren't allowed to see Hair when it was there because of the nudity (we were too young) but my older sister got to go. They don't do shows there anymore...just concerts.
I still go to Ogunquit and Cape Playhouse.....it's a fun way to spend a summer afternoon or evening.