I have argued with a lot of people about it immediately after the concealed carry laws went into effect in Kansas. Individual banks can post a "no guns" sticker, and many did in the immediate period after CCL became legal, but not all.
We are prohibited from carrying in churches, something almost totally ignored, I know even Preachers and Priest who carry concealed in Churches, as do many of their parishioners. No body seems to know now how that got tacked onto the Concealed Carry Bill. Most people who carry just ignore it, and at least one large Catholic church recently held a parishioners meeting, urging them to not leave anything valuable in their car during services due to break ins.