What is Texas law on CCW and postings? In Minnesota, if we have it concealed and they don't know it is no harm, no foul. If they see it and ask you to leave, you must leave. Key is they must know if you are carrying. If you are carrying, and they ask you if you are, and you say no, they can't search.
In Texas, if They find out they can ask you to leave. You don't leave, they can call police, who will ask you to leave. If you don't leave then, you're arrested for criminal trespass with a concealed handgun, or something to that effect. At least that's what they tell me in the CHL class. As far as I know, AMC theaters don't have metal detectors. In fact last time I went to the one in Mesquite, that's 20 minutes from my house, I carried, and I didn't see any sign. Well there may have been a "Gunbuster" sign. It's been a couple years.