I used to know a graduate student who was perpetually stressed out. He was so anxious that he had insomnia on a nightly basis. When I suggested that perhaps he try a yoga class, his reaction was almost violent. I asked why he seemed so anti-yoga and he proceeded to explain to me that no man - even one who is highly in tune with his feminine side - would be caught dead in a yoga class. Now I know for a fact that not all men feel this way about yoga, but there seem to be quite a few that do.
I've been practicing yoga for almost 10 years; I spent the first 7 doing Hatha yoga in rooms full of lithe young women wearing shirts with words like "Namaste" and "Shakti" written on them. Usually our yoga class would be about an hour long and begin and end with a period of meditation. Careful stretching and balancing would be set to the soothing sounds of rustling leaves and Native American flutes. To be honest, these classes were at times boring, but they made me feel a lot less stressed out.
A few years ago I tried a new form of yoga, 
So given this description of Bikram, its not too hard to figure out why it seems to be the one form of yoga that's recruited a male following. In fact, it's not just a more masculine form of yoga - it's a more American form of yoga, with its emphasis on physical performance and sculpting the body.
