Yes SCORE is a great resource. We have used them for various sources of advice of the years. Go check out your local chapter and you'll find older seasoned business people with YEARS of experience ready and eager to consult with you. They will be fascinated by your entertainment related business! Remember they were used to setting up retail shops, or doing airline marketing, or manufacturing soft drink cans...whatever. The thing to remember is that business principals apply to entertainment, and especially to small time entertainers that need to improve their exposure and income within a certain local area. That takes guts, strategy and business thinking.
In the USA.... you can find your local (FREE) S.C.O.R.E here