It's possible that some people just don't feel comfortable taking classes from someone who self describes as aggressive.
A lot of the women didn't want to work hard. They just wanted to have "fun".
I got a pass from students because I was a male and they didn't expect me to be dancing and prancing across the stage. I had people said they were going to try my class because "I looked like I would give a good workout". That was when I first started and I really sucked when it came to the fundamentals.