Ok, but what is a Substandard do ??
If somebody is genuinely trying to help a charity they're gonna want as many people through the door as possible and that surely means catering to the widest possible taste, which is going to be Motown, Club Classics, The Snake and all that--not that it would pique my interest, but then again playng the rarest, most exclusive music isn't going to appeal to many of the target audience is it.
So long as the charity gains and the folk that attended enjoyed it can't see a problem.
BUT- using a Charity banner to start another oldies night or one that fails to get any money to the charity is decidely Out Of Order