Hi
I just noticed this thread - so apologies for coming to it late in the day.
I'm the only guy who attends BodyAttack at my local gym, and it's always been the way for as long as I have been going there (6 months). I regularly attended BodyAttack at another gym near my old home last year, and out of a class of 30 people we would have 0-3 men. Ironically I first started doing BodyAttack with a male instructor.
In contrast, at my current gym the BodyCombat class has a regular attendance of around 30 people, with a male contingent of 5 guys.
In terms of a blunt and unscientific analysis, the men I know won't go to the class because they consider it 'girly'. It's nothing to do with cardio burn, slimming down or preferring it to pump. I see it as a macho thing - you can pass BodyCombat off as a kickfit class, or shadow boxing therefore that's suitably manly! BodyAttack is viewed as something akin to Jane Fonda aerobics, requiring precise footwork and co-ordination, ergo girly! Shame, because I think the perception is wrong and they don't know what they're missing out on :-)