I tripped across a post over on the RPG Site about a rock 'n roll RPG, and in a comment, I stated how I would go about it...
This was in 2006, eight years ago! http://www.therpgsite.com/showthread.php?t=2799
What I said was "I'd do it as a straight historical game. Since I know the subject - I was a
rock'n'roller - I'd pick the period, research it, describe the
conflicts that defined the era, and hinge the game on that. I'd set up
metrics for internal tension vs. personal satisfaction - basically
internal tension is the drive and ego of each of the bandmembers, while
personal satisfaction is fame, money, and artistic worth. So long as
personal satisfaction is greater than internal tension, the band stays
together. If the reverse happens, it triggers problems. The group can
kick out a PC, the PC can voluntarily leave, or the group breaks up and
the campaign ends."
That's not too far from where I actually ended up, basing everything on the Hope mechanic. Huh! Thank God I had eight years to learn how to write RPGs in between, though! :D