Let's all agree that, if you are filming a musical, you shouldn't have to use body doubles for the dancing, because you would only cast people who can dance.
And let us not forget Blaine Savage, who danced in Bob Fosse's "Dancin'", as the guy who has to leave the audition because he is also a waiter.
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba