If the occasional "old fart" has a valid student ID he should be ok. A student is a student ~ and I'm sorry, if your ballet school has ID cards and those count (I've never seen that, but I've heard it), a full-time grad student should count too.
I am validly a full-time student (and full-time teacher)...and I'll be 36 in a month. And I've never had a problem. (Granted, no one believes I'm that old...most people say MAYBE 25.) Even at
A Moon For The Misbegotten where some things online said they would be checking IDs for 25 and under.
Experience live theater. Experience paintings. Experience books. Live, look and listen like artists! ~ imaginethis
LIVE THAT LESSON!!!!!!