Retired two different times and then decided to take on some security jobs just to have something to do. Ended up having to change phone numbers to actually stay home or go on vacation. I have been wintering in the Panhandle of Florida the last three years and made the mistake of having a beer with a group that has contract security work there.
I did hold out until it was my turn to buy the next round before telling them that I had no interest at all in doing any kind of work. Yes, I stayed and bought the round. Long winded way of saying not working takes some getting used to but some of us do. I 'know some that can't though. Some can't afford to, others that won't stop working until they die because stopping would kill them. "Oh wait."