To be honest, you aren't going to find many banks who are open to cc, but they're out there. I'm pretty sure mine is but I'd change if it ecame an a
issue. Just remember it isn't against the law to carry in one,its just against the law not to leave if they tell you to because that's trespassing.
And even that might not get you the information you seek. Well documented examples of different policies amongst the different branches of the same parent bank.There are tons of threads on this here. Most name the banks and their policy. It's worth the time to track them down just to see who does what in case you decide to change.
I do remember others saying that PNC doesn't have these signs. Coincidently they are fee free for my USAA account. Not sure if the banks are related or not. Unfortunately there isn't one close.
Excuse me Mr. Bank Robber, you can't come in here... didn't you see our sign?