As much as I can. I travel a lot so not at all when out of town. I am an early bird so usually up at 5 on the weekends and the wife has to call me for lunch and then I usually knock off at 5 pm. If my social director hasn't made plans for me it will be like that Saturday and Sunday most weekends more in the spring and summer when the weather is better.
My buddy who is retired spends most of every day in his garage (he's a car guy).
Mike