BALLROOM DANCING is good for anything that ails you. When you hear the first note and your foot taps you are getting therapy. I love all of it. My dear Joe taught me everything I know back when I was 50. He was a New Yorker and danced to all those bands when he was about 8. His cousins made him go so they'd have a partner and they taught him. He was the best dancer - you can do it, too. Do try - for me, because I can't do it anymore. I promise you will love it, get exercise, sometimes a bit of romance, some social activity...........
Square dancing is also good. It is simply walking to the beat of the music to the direction of the caller (singer). He/she just tells you what the next movement is. In the course of an evening you will walk about 2 - 3 miles. Round dancing, too.
I get excited about it all just typing this.