One thing I remember about high school plays--the larger the cast, the bigger the audiences. Every parent, grandparent, step-parent and sibling HAS to go see Their Baby in the school play even if they are onstage for 2 minutes and don't utter a word.
Ergo: Arsenic has a bit at the curtain call where the 12 victims currently at rest in "Panama" file out of the basement door and take a gag bow. If you get the football team to take the bow, suddenly doing the play is cool and the whole damn school will show up to see it. Box office goes up. Everybody is happy.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher