What isn't Folk?

Discussing what is &/or isn't Folk.

You want a specific? Festivals that call themselves Folk but are too big to be supported by Folkies and need the "festival" public and hence the acts are geared more to that fraternity.
Cambridge springs to mind - since you ask.
Music festival - for sure.
Bill Wyman a folkie? Yea sure he knows his blues, but his public EXPECTS, and they get. And it won't be Folk.