I'm Male.. and I teach/practice yoga. From my experience, I've noticed that the more rigorous classes tend to have a balanced number of male students.. meanwhile, the more gentler classes will almost always have a majority of women in the group.
My guess is that men really only care about their physique and muscle mass. I don't blame them as it's quite sensationalized in mass media. Nevertheless, that's why you mostly see them in the yoga classes that work on strength and power.
As for your yoga class, I'd be a bit skeptical too if someone was overloading you on chakras. Only in the higher stages of yoga should one be concerned with chakras. For someone starting out.. chakras shouldn't even be mentioned.
Sadly, most instructors, don't even have any experience with working on their chakras, but they use the terms haphazardly and just to sound cool I suppose.
Aside from that, Yoga is definitely a method to change one's whole life around. Personally, my perspective on life has gone 180 degrees. Not to mention the physical benefits along with that.
I encourage everyone in these forums to try Yoga.. especially the men.. as Spartan indicated, these classes are full of women.. How can you go wrong?