Well, the sort of folk music we play in our Sheffield session in the Hallamshire Hotel most friday nights comes from celtic Appalachia - tunes like Shove The Pig's Foot a Little Further Into The Fire, Nail That Catfish To A Tree and Grey Cat On A Tennessee Farm.
Squeezebox players and Bodhran artists are welcome to come and just listen. Morris dancers welcome as long as they play clawhammer banjo, flat-picked guitar, cross-tuned fiddle or doghouse bass and leave their bells and ribbons at home, although they're welcome to try some flatfooting. English songs are fine as long as they've been living in the Smokey Mountains for a couple of hundred years.

Cheers
Ray