First question your should ask a potential client is .."HOW OLD ARE THEY" don't try to be a hero or let your ego go for the money and get caught in a situation of younger music requests you can't play or even know....just some friendly advice, I know it's hard to say NO to the $$$$ but do yourself a favor sometimes you gotta do it or your in for a nightmare gig for yourself, your client, and a night you soon won't forget,......
play within your means and age group always.