If it makes anyone feel better. I manage a restaurant in central Wisconsin. The owner recently posted his NRA sticker and a sign on the front door that reads "lawful carry is welcome on this property". Both him and I carry often while working.
I would help them advertise their noble decision to ban guns from the premises. I would write all the local gun clubs, ranges, and sporting goods stores in the area, and attach a picture of their front door in the e-mails. I know I would appreciate someone letting me know of their policy before I wasted a drop of gasoline driving there.