The only person I know of who uses a phrase like that is Robbie Shepherd (presenter of "Take the Floor" and "The Reel Blend" on Radio Scotland) who says "our kind of music", a phrase I've picked up and used as well.

Speaking for myself, I mean by it that I'd like it to be your kind of music too, and I would be very surprised if Robbie ever meant anything different.

Places outside "folkie" gatherings where I've heard traditional songs: occasional parties (anybody know the bawdy version of "The Bonny Lass of Fyvie" that rhymes "come down the stair" with "I'll grab your pubic hair"?), gatherings of football fans, a drunk on a bus singing "The Worms Crawl In", quite a few kids doing playground rhymes, and the most haunting one of my life, my ex-girlfriend (now hopelessly psychotic) singing the whole of "The Bonnie Hoose o Airlie" in the middle of the night, sound asleep, with no recollection of doing it the next morning.