We have done this at Camp Broadway. They had to be 5 min mini musicals. This what I've done...
Little Shop of Horrors and JCS called Jesus and the Giant Peach...Jesus is sent by God to sacrifice himself to a giant man eating peach, (we had to go with a peach bc we had to include a special prop the day we performed these) our songs included "I Don't Know How to Feed Him" "Suddenly Jesus" and "Jesus Christ Little Shop" I thought we were going to get struck by lightning that day but everyone said it was the best so that's good!
The 2nd one I did was Fiddler on the Roof and WSS and called it "Fiddlin on the West Side." It's the Jews vs Catholics and Chava and Tony fall in love at the gym and you know, their people don't like it etc. Our songs for this were "When You're a Jew" "If I weren't a Catholic" And we changed the words in A Boy Like That and Somewhere. It was so clever the way it tuned out, I was Chava when we did this.
I was a counselor 2 years ago so this is what I did. My group and I combined How to Succeed and 42nd St. and called it "How to Succeed in Show Business..." Peggy Finch finds the book on how to make it bway and she goes from curtain girl, and charms and schemes her way to chorus girl to supporting role to leading lady by knocking off people that were in her way. I did song parodies of the songs How to Succeed and 42nd St.
I've seen some other clever ones, my fav one my sis did was Detention Tango which YAGMCB and Chicago combined. All the Peanuts gang singing the detention tango. It was soooo funny!
"Have a child for warmth and a baker for bread and a prince for... whatever!"