I love to do yoga! It is so relaxing. In Indian traditions they use it as their spiritual core.
I have a friend who owns a yoga studio. I think he enjoys the relaxation, but also the opportunity to meet young women.
Haha! I guess it has become quite popular with women. In the 1980s it started to be known as a form of exercise. I think women preferred it over a hard and sweaty workout. 
What then must you think of Hot Yoga? hehe
That is the yoga excepetion. Haha. I heard it is supposed to improve circulation of the joints. I don't think I could stand the heat. 
I could probably benefit from some yoga myself in order to improve my flexibility and help with my back pain.
You should try it! I would start out with Yin yoga. It is for beginners and focuses on postures. It is great for improving flexibility!