I think we are operating under different definitions of traditional. I would call what you are talking about more "in the traditional style" or something similar

mg has a point - Irish dancing is not really comparable. It's highly formalized, and has an organizational structure designed to promote it (as codified by the relevant bodies) on an international scale. If you do it according to the rulebook, you're in. Whether your network of social contacts includes anybody with a personal link to Irish dancers from Ireland doesn't come into it.