I've not gone to any classes, but I'm about to hit 60 and have been doing some yoga poses at home on recommendation of a physical therapist. I still work, and sit for quite a lot of the day, and osteoarthritis conspire to make me one stiff bugger if I don't do the stretches. So, I may take my wife up and start going... 'tho I'm such a cheapskate that I will likely say I can do it at home...