not at AMC, at least here... they allow you to bring in outside food.
National Amusements most certainly did/does not, however, I had no idea AMC actually permits that.
When I worked at a NA theater as an usher, I absolutely despised the policy of forcing people to "shed" their outside food and drinks (whether they gobbled it up right there or threw it away, nobody enjoys that, though the policy of no outside consumables was clearly stated so that was the risk they/we took). Even when I worked there and went to free movies (that was a nice bonus, plus free tickets for friends/family, that and the early screening for employees too), I still, on occasion, brought in my own stuff. Concessions are expensive as fuck!
But yeah, a lot of us [employees] were absolutely annoyed by the one or two policy sticklers that we worked with. If I "missed" something, if this one guy was around, he'd stop them and then scold me. lol
Of course, thanks to cameras and shit, if something was super obvious, I had to be the dick that made people get rid of something - just to cover my own ass. But usually, especially when busy ("was swamped, sorry I missed it"), I just let them go. Sometimes I gave them a little smile immediately after noticing something and some of them recognized that I was letting them go. Shit, I was only part-time making only a buck or two more than minimum wage, I couldn't force myself to be that much of a dick/care that much, for so little. You get what you pay for.
😛
I have no idea about Rave Motion Pictures (company that bought the local NA theaters a few years back) and what their policy is towards outside food and drinks. Hmm.