I have only danced salsa, so I cannot comment on ballroom, swing, etc. Here in Japan, the median age for ballroom dancers(or at least the ones I see practicing in all of the dance studios in my area) is like 55. They do it for their health, basically, but there are some couples who compete. Salsa dancing-hmm. Yes, a lot of guys do it "for the chicks" and some just go to our parties because they enjoy the music, LOOKING at the chicks, and drinking beer. The women I know tend to persevere more than the men, who are slaves to their employers, thus cannot attend classes as regularly as the women. I have seen both genders get discouraged, thanks to instructors throwing dead beginners into intermediate pairwork classes, and quit. Why do women dance salsa? Because it makes you feel like a woman, you can wear sexy clothes, it's a great sport, you keep yourself in fantastic shape and can meet fun people! I think this can appy to ALL forms of dance!