LOL. Well a lot of them seem to think they can - they do have the choirs. I'm probably being a little harsh there but I'm not really a fan of male voice (or most for that matter) choir singing.

For a Welsh musical tradition, although I don't know many tunes, I'd take the dance music which people seem to be more aware of now. I went through the second 1/2 of my primary school and the first 2 years of secondary, came back to Wales when I was about 18 and probably was getting on towards 30 before I knew of it.