I run a folk club, yeah big deal.

I visit clubs and sessions and invite people I hear who if I think are up to it to come and play at the club.
I am also fortunate in organising a 'pub lounge' gig that can accommodate floor spots, then I also run-MC a singaround session where anyone can play.
This is how we have built a sound basis of quality residents and how we have booked some lesser known artistes.
Our audience depends on my judgment.
If I expect the audience to pay I must give them good value in return.

I think the way ahead is to book a Name, and a lesser known performer as a support act plus 2-3 residents per evening.
Unless I know the artist, I would want to hear them perform first.

My major discoveries include: George Papavgeris, singer-songwriter of the highest calibre, whose songs are creeping into the repertoire of among others Martyn W-R
Brad Bradstock for M-Keynes, and the living archive tradition
and Hilary Ward, the 'Linnet from Luton' ex Luton Girl's choir , remember them?
There are others too

Yes there is a place for folk clubs and we must support them and each club must support other clubs too.