As to the amateur singaround - no - no minimum 'standards'.
I don't think these amateur music clubs claim to be representing "traditional folk music" (or if they do they are wildly delusional) and as such aught to get on with their business unmolested by formal EU standards. If they do in fact wish to claim they are the genuine representatives of 'real folk music', then they better have a re-think as here's far too much out there in the real world by young urban artists who can realistically lay claim to that title...
IMO