What a super idea and one that could really take off here. I know that people who have always been physically active and sporty are often able to continue with their chosen activities until well into retirement, but there are many of us who remember senior school PE lessons and teachers with dread. If you were not school team material, it was a nightmare and PE lessons, especially cross country, were the best way of putting many of us off formal exercise for life. I, for one would welcome a class like this where we could do gentle exercises without judgement on our abilities (or lack of!).