Around here, a Silver Sneaker membership allows full access to all of our recreation facilities, including two different rec centers.

There are special Silver Sneaker classes, but you don't have to go. I went to a couple, and will never go back, as here they seem based on the assumption that we are all almost in a nursing home, and the classes and the way they treat one are what one might expect in a nursing home. I.e., "sweetie" "dearie" - "be sure to cross your midline" - "these exercises are good for your ADL's (activities of Daily Living" - "please don't take more than a 6 pound weight," etc., etc. They even had a monitor in the back to see if you were doing anything wrong - she and I really tangled one day! YMMV.

Not my style, but some folks enjoy them.

I have some stories in detail if you want them.

But, heck, it is free. Except my medicare supplement plan doesn't cover the cost, and my wife and I pay $400 per year for the membership.