think big- any minhag can be taken and distroyed. there are many jewish weddings that have mixed danceing- so should we stop dancing.
I have been to many many mitzva tanzs and there is always a shtick feeling of yom kippur. machal (dance) from lashon mechila (forgiveness.
Intresting to note, in many yerushami families the kallah wears a viel at the mitzva tanz .