It's interesting that you should say that actors are more disciplined than musicians. I'd never really thought much about. Then a musician friend who had been cast in an out of town production of mentioned to me how much harder he thought that actors had it than musicians. When I asked him what he meant he said, "Why, at the end of the run of the play, they wouldn't give me my paycheck until I'd cleaned out my dressing room. I never have to do that when I'm playing a gig with my band."