I don’t know what theater chain that one belongs to, but some are gun free zones.
Check your state laws. Unlike schools, most businesses can only ask you to leave if they spot your CCW. If you refuse they can charge you with trespassing. I would take the option of leaving if asked rather than being a sitting disarmed duck. I do avoid gun ban businesses, but I have found that I carried and did not even know their policy until I read about it later.