Last night we attended an Irish music sesíun (session). The only cultural group represented-- aside from actual Irish persons-- were Jews. I have observed this in many different sessions and in many different cities (including in Ireland). Again, aside from ethnic Irish, they also tend to be the best musicians (but not dancers).

We are also interested, in vast disproportion to actual numbers, in many other kinds of weird, generally way outside the pop-cultural campfire, ethnic musical traditions.

Anecdotal to be sure. Meaningless? I don't know.