Comment by relwin
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.)
A (plant) nursery, a library, elections are all stuff that I've considered.
Thanks for reinforcing the library thing (I live in a somewhat rural area so maybe different issues there).
I've also thought about machine operating in landscaping (I know how to run a tractor and a skid steer so I think I would pick up an excavator pretty quickly) but I worry they won't want a part-timer.