I had an off-duty cop who was working security at Wal-Mart stop me when he noticed a pistol on my hip (under a shirt that wasn't tucked in). He asked to see my permit and, as required by law, I showed it to him. He said that Wal-Mart only wanted guns carried on their premises by law enforcement. I replied that, if that's so, they are required to post a sign to that effect at each entrance to their store. That's the law here in Tennessee. When I got home later, I e-mailed Wal-Mart about the incident and their response was not only apologetic but quick. In addition to an e-mail relpy, I got a phone call from some kind of regional manager stating that the security guy was completely wrong and acting on his own. So, I suggest a follow up with Costco upper management.
I was showing my receipt to a large black lady attending the exit door at a Sam's Club in the north Atlanta metro area when my jacket fell open and my legally carried S&W revolver was revealed. She smiled broadly and gave me a thumbs up as she handed back the receipt. I didn't ask and she didn't volunteer a comment, but I got the distinct impression that she was on my side of the issue concerning CCW in Walmart and Sam's stores. Since WM donates 97% of it's political donations to Republican candidates I will give it the benefit of the doubt on CCW issues until I see an official announcement from WM to the contrary.