I have a small but interesting new data point. I went to a free yoga class at a far away studio in another town which is much more affluent and which also has an older population. In the class, a whopping 1/3 of students were men. Grey haired, fit, confident looking men. Do they care more about their health thanks to wealth, possibly more leisure time, better education or what?

I really liked the class but do not have time to travel that far regularly for the class I liked. Liked the teacher, too.