You miss the point - you don't have to advertise People Music, because People Music just happens regardless. It's feral, populist, and (in general) anthema to folk fans. It doesn't matter if it's a bunch of street musicians inspiring spontaneous flash-mobs outside the Arndale circa 2012 or an old shepherd singing ballads to his flocks in the Wild Hills o' Wannies circa 1912, the context defines the potency of the content which, once removed from that context, no longer strictly exists.

but the people also happen to like BRITNEY SPEARS and tie the yellow ribbon and tiptoe through the tulips

Style / quality of the music is immaterial here; all that matters is its context & ability to TRANSFIGURE the CEREMONIAL / RITUAL experience. Is this the place to remind you all that BRITNEY SPEARS is an anagram of Presbyterians?? I think Folk is not just religious, but is very Presbyterian to boot.