AMC has hot dogs, ice cream and nachos, don't recall seeing burgers, tho. And, of course, popcorn/candy.
Pasatamore has counter-service Italian food (in addition to the sit-down restaurant). There's a Cinnabon across the way. There's also a walk-up place on the second level that sells burgers and such, but it's not always open, think it may be seasonal. I believe Latin Quarter has a walk-up window as well.