not a "crazy" concept - but i worked at a small theater years ago and the director put a great, definite concept onto the musical revue "And the World Goes Round".
he placed the show in a bar after hours in the late 70s. each actor was a stereotype/character:
- young sailor on leave
- sexy black bar back (sang the sexiest version of "Sara Lee" I have ever heard)
- sultry torch singer (began the show with "World Goes Round")
- older woman who owned the bar (sang "Class" with torch singer)
- a prostitute (she was dressed like Jodie Foster from "Taxi Driver" but as she sang the song "My Coloring Book" she removed the big floppy hat, sunglasses, and blonde wig - it was chillingly effective)
- her pimp, also a drug dealer (sang "Kiss of the SpiderWoman" as he was shooting up)
- a rich socialite in a gorgeous Halston-esque dress (she sang the **** out of "How Lucky Can You Get" - that was the highlight of the show - the actress is Lisa Gabrielle-Greene and she is PHENOMENAL)
"The theatre is so endlessly fascinating because it's so accidental. It's so much like life." - Arthur Miller