I'd agree with Richard, more or less.

This thread should not be discussing whether any particular genre is better than any other, but rather, why do we have folk clubs, and what should they doing.

As someone who usually describes himself as a blues singer, and who has been described (a long time ago) as "Edinburgh's only traditional Dylan singer", I went out of my way to learn Scottish traditional material, and to try to learn traditional styles of performance, with initially at least, some interesting results. However, when I'm in a folk club, I'll always include traditional material in my set.