Comment by apercu
I would like to have some meaningful part-time work when I retire.
Sure, I garden, landscape, play with my tractor, spend more time playing guitar than any other hobby and go to the gym 3 times a week, but I would still want some sort of additional "purpose" to keep me engaged with society (I'm not exactly an introvert but left purely to my own devices I tend to entertain myself pretty solitarily).
I help out at the local library part time. You meet a variety of people (some you know already) and can help them in some way. You're also exposed to a wide range of humanity from assisting kid's activities (fun!) to tolerating confused transients (less fun.)