This actually annoys me about arenas. We went to an event at one place and I checked the tickets and the entrances for "No weapons/firearms" notices. Seeing nothing I went ahead and CC'd. At the door they had a scanner to check tickets. The ticket taker asked to look in my wife's purse. She opened it, the taker glanced in it briefly and we were on our way.
"What were they looking for?" I mused aloud. My brother said "Shooters?" I said, "Well, missed that. In a manner of speaking." He joked, "Oh, no. Those are shootAHs."
Separately, we went to the U2 concert at Invesco and I went unarmed per a no weapons policy. I was less concerned about the concert than going to and from the car that we parked off the 16th St Mall. I did security at a U2 concert years ago, but pat downs were light, only checking hips and front pockets for glass containers.
As we approached, I was watching to see what security was like. There were a few of Denver's finest scattered about, but no pat downs. As we go through, the ticket scanner again asked to look in my wife's "purse". "SERIOUSLY??" I thought. Her "purse" was basically an ID container. It was barely big enough for a DL, credit card, and a couple of bills. Hell, if she put a chapstick in it, the thing would have trouble closing. WHAT do they think she was smuggling? And they again barely peeked in. Any nefarious substances in the bottom wouldn't have been seen. And here I am behind her, jeans with big pockets, bulky leather sportscoat, and I'm just waved through? Seriously?