I believe I read somewhere that it depends on the theatre. I know that the Minskoff requires tuxes, but I'm not sure about others. I think it's also a matter of if the orchestra/band is onstage or in the pit – for Waitress and Great Comet, for example, they're onstage, so the conductor/orchestra are dressed to blend in with the show (for the former, I'm pretty sure they all wore casual clothes/flannel, and for the latter, they're decked out in full-out costumes).
Updated On: 6/26/17 at 09:50 PM