Small Show to Direct

Hey guys, I am need of a smallish show to direct, with around 15-20 people in the cast. Preferably one that doesn't need a hugely complicated set. I've got a couple ideas floating around in my head but I was wondering if you had any good thoughts, or maybe some obscure stuff that is awesome but that no one knows about. Thanks!

Once on this Island, Bat Boy... I'm not sure if these are what you had in mind.

It's only a four-person show, but "Veronica's Room" is brilliant.

"One Flew Over the Cuckoo's Nest" is essentially a one-set show with a cast of about twenty.

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Smaller cast than you were thinking - You're A Good Man, Charlie Brown can be done with minimal sets i believe.

Lucky Stiff is written for 15.
Someone else mentioned Once On This Island which is written for 11 but works nicely with 15 also.
I guess you could do Godspell with any number of people.
Dames At Sea is also hilarious and can be done with 6 people or 60 people (but it's a tap show, although you can work it so only the girls tap).
There's a production of Pippin opening in Sydney next year with only 14 actors (can't quite remember the actual figure, but something like that).
Also, Into The Woods is usually done with only 17 actors, and if you remove all the doubling there are 21 roles (23 if you count Sleeping Beauty and Snow White).