This reminds me a lot of the concept of 'job ghettos' that my mother introduced to me a few days ago. There are a lot of jobs usually considered either crappy or low-status by the population at large where the people in it are not a representative sample in some way or another - the administrative assistants in the College of Science, where I'm a student (and graduating in two weeks), are almost entirely female; construction is almost entirely male; the surgical techs at the hospital where my mother had her surgery were almost entirely non-white; and so on. Stripping is a crappy, low-status job (as much as the 'sex workers citizen brigade' would like to deny it, they are always going to be a low-status, crappy job viewed with disdain, in part because you need no qualifications other than anywhere from good looks to a functioning set of genitals), and it's almost entirely female.