I think I'd actually respect this sort of thing more if it was a straightforward class teaching you how to dance sexy for a partner, with the aim of getting some hot sex in your near future. Disguising it as a workout when, as Jessica notes, you don't break into an unladylike sweat, is what really offends me. My whole life, working out has been one of the areas where I feel like I can zone out and not be constantly micromanaging my status as a sex object for others to look at. I don't think I'm alone in this---a lot of women report exercise as appealing because it's meditative, or alone time, or time to focus on yourself as a person and your body's ability to do other things besides attract attention and arouse. These "stripping is a workout!" classes seem like an assault on that.