That would not fly.
First thing the defense lawyer would point out is that you were not forced to enter the property.
In the case of government property; DMV, Post Office, courts, etc., I do believe that they should be required to protect you or pay damages.
Which is my point in responding to the post I was answering. If Government is going to play any role here, it's to make those owners liable. Certainly, the patrons did not have to enter the property for the movie, but nor was the property owner forced to make disarmement a condition of access. If nothing else, the property owner has unequitably applied his policy. In this case, God only knows how many legitimate CCW permit holders voluntarily complied in the belief that the theater owner would enforce their ban. Holmes is proof that the owner(s) didn't.