We have a local cinema that offers bookings for events here, too. There's a lot of behind the scenes jank to get through that many people don't even bother.
You can choose not to go to the cinema. The options here aren't "accept or disobey".
You can entirely remove yourself from the situation, given the fact no-one is forcing you to go into their private premises.
Unlike actual fascism in a country where escaping the government is, at best, uprooting your entire life. Or worst, illegal / risking your life / impossible.
Suggesting theaters are going to check people for a full stomach before entry is absurd stuff that should probably stay in the bounds of black mirror-esque science-fiction works.
We have a local cinema that offers bookings for events here, too. There's a lot of behind the scenes jank to get through that many people don't even bother.