Folkiedave
week after week of well-practised professionals

Looking at the seventeen Saturdays covered by the website listing, I would say that five could be classed as professionals, seven are singarounds/sessions and the rest are high quality amateurs.
Yes, we book well-practised professionals but as far as I recall we have never refused a floorsinger a spot because they weren't good enough, mainly because the situation hasn't occurred. OK, some of them may not be star quality but they still have something to offer. You seem to think that because we encourage everyone to sing or play that ALL the floorspots will be terrible. There are a lot of people out there who are very good indeed and perform for the love of it without wanting to make a career of it.
On consideration (I speak for myself, not the club), I do think that they ARE folk music. The superstars wouldn't exist without them. Conversely, the superstars give them something to aspire to.

Despite being nominally eclectic, we pretty obviously have a traditional bias so maybe that saves us from the teenage angst singer/songwriters. That might be a test case. At least one of our number might have to be physically restrained or at least sedated with large quantities of Harvey's Best Bitter.