Where there is prissy folk dancing let there be mighty raving and rioting!

Fair enough, but it's a question of how you get there. Tell a polite well-meaning middle-class folkie to adhere rigidly to a pedantic definition of 'folk' and you may get Two Pretty Boys* or The Cruel Ship's Carpenter. Tell the same person they can draw freely on the untapped wells of their primal inner creativity and you'll probably end up with "let's all join hands and save the weasel".

*One of my very favourite songs. I don't do it much, though - people seem to find it a bit of a tough listen (all that blood).