I've done yoga class in high school. We took naps a lot, and there were a lot of hot tall white girls. But there was this one fat indian chick that blocked a lot of my views. :( When I actually tried yoga, it was kind of hard since I wasn't flexible. Oh yeah, we took a lot of walks, but I don't think it was the real yoga deal.
my choice would be lots of stretch and posture training (yoga and pilates type) and go for karaoke sometimes