Place to hang out for several hours?

I have a couple medical appointments at UVM that are about 4 hours apart next month. I won’t be able to walk or stand much after the first one, and I live far away. I’ll get lunch and probably hobble around the grocery store, but I’ll still have a couple hours to kill. Any suggestions where I can just sit for a couple hours? I’m happy for pay for a cup of coffee to sit in a coffee shop if there’s one where I should be able to get a seat on a weekday afternoon and stay a while. If there’s something more exciting than a coffee shop, I’d love to hear it. Thanks!