I agree with the TIA article in that dancing itself is no intrinsically bad; but it becomes bad insofar as it favors bad morals. There are some dances which are fine. The folkloric ones, for example, which do not entice lust, romance, or other disordered passions by means of immodest dress or sensual movement. The problem with Ballet is twofold: the immodest outfits and the improper poses for Catholic girls (and boys). In the article, we find a simple criteria for parents to discern the appropriateness of dances:
1. Dresses are modest
2. Positions are appropriate
3. Movements are decent
I do like the idea of folkloric dancing because it is much more modest than most modern dancing and always has a charming theme as well.
My children are mostly German and Italian so it would be fun to search out performances by these and other nationalities as well. I think Irish dancing is just lovely.