My husband and I came to Bar Harbor for our honeymoon, but it rained almost everyday. This put a damper on our hiking plans, but we got a tip from locals about Reel Pizza Cinerama. Come an hour before opening, regardless of when you film starts. Grab a seat, then order your pizza. Good thing we listened because the place filled up fast, someone seemed to be having a small birthday party with their friends, and our pizza was done literally as the movie started. The place is pretty low-key, nothing fancy. There is a fun repurposed bingo light up board that lights up when your pizza is ready so it isn't too distracting.
There are lots of great options, some locals beers (some vegan some not) and lots of vegan options for the pizza. We got a cheese-less pizza but I happily sprinkled some nutritional yeast on top, which they provide. They have soy cheese and lots of interesting veggie toppings. I believe they do take out as well, so you don't HAVE to watch a movie for the pizza, which is also rad.
Cons: Super popular (hard to get tickets), Limited Film selection