I quite like disco music, although I don't know if it'd fit into the 1954 definition of folk? I guess there is probably a Morris troupe somewhere who dance to Donna Summer, though. And if not, there certainly should be. Though I'd advise them to lose the blackface in such circumstances. Ewan MacColl famously said "Oooh, I LOVE the Village People (even though I have reservations about that man being of Indian heritage or not)", so if it's good enough for him etc.

Altogether now - F-O-L-K it's lots of fun at the E F D S S etc