I used to work for my city's Parks and Rec dept, specifically in aquatics. They've got work across multiple fields, whether you just want to man a desk checking people's pool passes or if you want to be a maintenance person or even if you want to climb the ladder and be a manager, and at all levels the vibe I got was very chill. You'll probably be underpaid and underappreciated, but maintaining public spaces is an unqualified public good so you'll get to go to work everyday knowing that you're not making the world a worse place, which is great.

I did this job full time while also attending school full time, it was minimum wage but it worked out great since I was able to do homework "on the clock" for most of my shifts, since generally I had a bunch of things to do when I showed up and then a few things before I left and I had a lot of time in the middle where I wasn't doing much.