SEO for possible duplicate content
I think the answer relies on the way you organize your content. I imagine bands could be a content type, with fields like bio, discography, pictures, videos and whatever, and a field with multiple values to add users, beeing the band musicians. 

The users get their own fields from which bio. Then you can display a list of teasers of musicians in the band node, with a link to complete profile and bio. 

EDIT : (for lazy or busy musicians :) I guess NY Big Band staff i.e knows all members's emails, names... 


Create a role "band manager" with the rights to create user accounts
When an account is created by this role, set up a rule to send an automatic email to notify the musician,  that an account has been created for him and he's welcome to check if his information is correct.


This way you 'll have a unique "musician content", without SEO duplicate problems, and you 'll also improve the involvement of musicians in your website.