Sorry, I leaped to the possibility that the WA in FATMANWA referred to the state. Not the first time my leaps landed me on my butt.
The Ohio Rifle and Pistol Association has a pretty good handout card for businesses which are posted:
http://www.buckeyefirearms.org/publicfiles/pdf/NGNM-card.pdfIn States where concealed permitted carry is allowed, I believe that a lot of "no guns" signs are due to the fact that store owners, corporations, and corporate lawyers are simply not aware of the fact that permitted carry is allowed by the overwhelming majority of states.
I wandered into a newish Gander Mountain store about a year after I got my carry permit, when the concealed carry law in Colorado was also relatively new and the first thing that I saw was a hand-lettered sign that said all weapons had to be checked in.
I stepped up to the first available cashier and asked to see the store manager and asked him about it. He said he did not think about CCW permits when he had the sign drawn up, and explained that it really meant that guns in for repair or trade-ins had to be checked in.
The permanent printed sign about a week later had a words to the effect that repair or trade-in guns had to be checked in and spelled out an exception for concealed carry permittees.
I inquired at my local range when they put up a big "stop sign" that demanded that all guns must be unloaded, because I did not want to unload my carry piece, then reload it after I left. My position was that unneccesary manipulation of firearms was a frequent cause of ADs and NDs. They said it was okay to carry loaded in the range as long as I wasn't going to draw my sidearm, but left it in the holster.
There are unstated complications to that position, but I let the subject alone at that point and just nodded and said, "Oh, OK."
Terry