You can't begin to get that eclectic in any other setting, IMHO.

I'm not sure about that. Over here the folk scene is pretty eclectic and open to any kind of music, a lot of the time. (There are exceptions - my God, are there not exceptions...)I know sessions where anything from Otis Redding to Oasis to Carolan or Bill Monroe would all be quite accepted.

The Country scene over here on the other hand seems a lot more choosy about what is seen as acceptable. That's probably down to a sense among British Country fans that it is not really "theirs", which Americans surely can't have. (And maybe among folkies there is a corresponding sense that "folk" is "ours", so we can define it how we like.)