“pet peeve”, I think you’re wrong.
Men, who have spent many years learning halacha and other areas of Torah are quite capable of expressing an opinion on this matter, though there should always be sensitivity.
Back to the topic:
Again, Zumba is “sensual” in nature. You simply cannot argue around that and it is therefore not justifiable for anyone no matter who they are or are not in front of. For other types of womaen’s dances/exercises, too, there’s no reason to use perverted motions and/or non Jewish music.
There’s no reason you can’t do fast dances, to fast Jewish music, that exercise your entire body in a dignified manner befitting a bas melech without resorting to disgusting animalistic imports from the land known for this particular form of pritzus.
I did not see anyone discouraging exercise for either gender, and that would be a mistaken notion if anyone did. But find a way to exercise that fits with kol kevuda bas melech penima, not to mention simple kavod haAdam and don’t resort to the many impurities from the street.
I’m curious how many defenders of this disgusting practice would feel if they heard the Queen of England takes Zumba lessons. Would they not think it’s at least tacky? Why is a Bas Melech not given *at least* that much chashivus?