I have no quibble with your description other than you seem to be talking about traditional folk song while I am encompassing traditional and contemporary, which is where our wires seem to be crossed.

Please clarify your phrase that you can go to a folk club and hear no folk songs. Are you talking about hearing no traditional songs or hearing no folk songs of either type?

You have recently agreed that you would be happy with an evening of Ewan MacColl, Vin Garbutt and Cyril Tawney songs at a folk club. You would obviously unhappy with an evening of Buddy Holly songs. My point about "between MacColl and Holly", as I have explained before, is that there are millions of songs between those extremes. I was trying to determine at which point does contemporary music become unnacceptable at folk clubs.