I’ve looked to volunteer before at the library and have been told they have too many! The library does have a friends group and they organize a big book sale once a year. The books are sorted and put out in a huge gymnasium. I’ve volunteered there as well to sort/arrange/sell books. Usually come home with a big box of books too 
This wouldn’t count as a part time job in retirement though. Would be great if I could find one like that…
My town’s store is run by Friends of.
Town next door is a commercial operation (a used bookstore in town closed when the rest became too high) which gets free rent in exchange for half the revenue. They also rent space to a chain coffee store with fancy sandwiches.
Pays to ask the question, no?
I am far from retirement…
I can envision math tutoring, teaching in some tutoring program, substitute Math teacher in private or public. However, if DD will end up with private medical practice eventually, I have feeling I will help to run it 
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My town is always looking for lifeguards. Not just in summer (when most retirees would rather be playing) but also in winter since so many of the lifeguards head back to school in the fall.
Lifeguard at 65+? Maybe lifeguards’ manager 
Not every retiree is 65+. Not sure if there is an age limit, but there are definitely stringent tests you must pass. I imagine it would only be a possibility for somebody who had been a lifeguard in youth and kept fit. But yea, lifeguard manager could work too.
I have a friend who started lifeguarding last summer after getting laid off. She’s gotta be at least 55. She loved it!
Never mind, link didn’t connect properly.
Today’s paper had an article about finding seasonal jobs in resort areas and such, including Mackinac Island and Martha’s Vineyard.
I have thought about either becoming or subbing as a para in local elementary schools. Many of the paras here are part-time so would give me time for the gym and other stuff. However, the only school holidays for travel would be a challenge. Depending on the situation and the kid(s) being a para could be a very rewarding or very difficult situation.
My brother-in-law became a lifeguard at his local pool. Not yet retired but of retirement age.
My DH is a cook for a non-profit weekday mornings and loves it. Not doing it for the money, btu enough for some extra travel.
When I retired at 61 (state job so have pension of about half salary plus insurance) my plan was to give myself a year to get things done and then work part-time for extra money for fun things, delay claiming ss and because I’ve been earning money in some capacity since I started babysitting at age 11 and I feel unproductive if I’m not. I’m about 2 weeks away from that 1 year mark. I’m not interested in/qualified for sports things; food service; providing home care; driving people; teaching; telemarketing. I’m excellent with details and paperwork could see myself doing proofreading, editing type work. But I have no credentials, although I wrote some in my job and I like writing. I could also see a flexible type job of staffing events or in person type customer service especially for cultural organizations. I like elementary aged kids. I’ve also thought of working in a hardware or craft store. I’ve seen some remote jobs on Linked In of the proofreading or editing type but it’s hard to know what’s legit. In the old days when I was in college and grad school I worked through temp agencies like Kelly Services and did office work for a day or week or so. I enjoyed that - you’re not there long enough to deal with office politics. I don’t think something like that exists any more though. Anyway, this thread has been timely and interesting.
Around here some people work part time for a company that grades essays for standardized tests. I think it’s seasonal, with need for a 4 year degree but not necessarily teaching (?) I can’t put my hands on a example job posting, but while looking I saw a posts looking for help at campus writing center… seemed interesting .
My friends kids were using a temp placement agency when they moved here from UK. It ended up mostly being sales jobs on commission which they hated and a few one day event gigs. One went into teaching and one got a job at Costco and then created a kids activity program and is now running his own business with hourly employees.
I have retired neighbors who have done a variety of part time gigs.
Umpires, grocery store stockers, one of my neighbors drives school busses for sports teams. He was telling me that he busses the kids to the local ski hill, skis while they practice and drives them back to the school.
I have another neighbor who runs a literacy program. And another who tutors within that program. Right now they are tutoring Ukrainian emigrants who they have bonded with.
Lots of different opportunities if you want them.
Another part-time gig is tax preparer. I think the big places will put you through training and you can work tax season then have time off.
I really want to work at an airport in some kind of capacity. I’m willing to do almost anything. I hadn’t thought about being the tram driver. I could definitely do that!!! But I get giddy anytime I drive up to an airport. I don’t even need to be going anywhere. In the dark ages as a teenager, I actually was a lifeguard at the Dulles Marriott. I loved doing that. But no lifeguarding for me anymore. I hate the water, even more so now.
My main problem is that we don’t live near an airport, though I suppose an hour (50 miles) commute isn’t too bad. I did it for a few years when I was younger. I had assumed we would be moving to Ashville when I turned 55 so H could work at the Biltmore Estate. He’s been so gung ho about that for as long as I’ve known him, but the last time we were there, he didn’t seem quite as interested. It would be better financially for us if I could stay in my regular job until at least H gets closer to Medicare age.
P.S. Being a bus driver in our area is NOT a good gig. H (retiring teacher) says you couldn’t pay him enough to do it. And our drivers start at $14.79/hour with no benefits. It’s a rough job, but I know many areas it is different.
Bus driver benefits vary a lot by state/district. We know somebody who was fortunate enough to be able to retire at age 50. But he had a wife and young son, needed medical benefits. He started driving a school bus - loves it. After 10 years he qualified for small pension and half price medical… but he’s opted to keep driving. He’s a boater end likes having summers off.
A future senior or grandfluencer/Fitness social media influencer here. 
They are def out there! 
Exercise instructor- I know one retired military who is a personal trainer. At my gym we have several instructors who are retired. One that comes to mind is 74 and in great shape. She teaches several Yoga classes, a balance class, strength training and mat Pilates.
An even older woman teaches the senior chair fitness and water exercise for seniors.
The handyman idea is a great one. It’s hard to get someone to come out for small jobs.
The sweet retirement gig around here is to be a seasonal badge checker at the beach. Get paid to sit under a beach umbrella and read. Half the time, the checkers are asleep!