666 has every right to pose his question - albeit the heading may well have been better considered.
Folk/music clubs/sessions could well be a starting point for *unknown* musicians/performers to begin a career, and, add to our musical heritage - after all, someone has to try to stop the; Karaeoke,
and big screen football rot.
Having said that, it is very difficult to overcome the inertia of the "it's aye been" mentality of both organisers and regulars at *certain* clubs.
O.K, book the well known acts - but also book the "unknown" acts,
and pay them at least their travel expenses and lodgings, you never know - their brand of music, verse whatever may tempt more and different people into the circle.
By the way, i'm speaking from experience - trying to get a bite of the circuit cherry!
Oh yes, regarding floor spots, everyone has to start (and sometimes finish) somewhere. don't be too rough with them - have the decency to discuss ways of improving (if at all possible) their skills, however, if that fails recommend they attend a nearby karaeoke venue!
Finally, there is no such thing as "Trolling" it's an excuse sad, intolerant, helpless people use.