Speaking as a guy who once found himself leading a chorus of Irish songs at a wedding party at about half past midnight, I have to think that folk is where you find it. To expand on that a little, the bride was a rather beautiful Indian called Zarin, and the groom was a Swede called Lars!
Serious thought though, I have known in the past a few singers of Folk who 'went professional' and became parodies of themselves. It really should stay an amateur pastime.

FC