And. often times concert venues search you anyways for weapons. Inside the concert venue wouldn't have mattered.
That being said, if you are going to have a weapons free place as a business, you should be mandated to have armed security.
My wife's hospital has the stupid azz 'No Weapons' stickers on the doors. Pisses me off.
I ignore those signs. All they can do is ask me to leave if they see it.
I simply don’t go to venues that search for weapons; I care not to be a victim entrusting my life to someone else. I’ve given away tickets at the door due to such searches.