Open carry
Open carry is the issue, concealed carry all you want. IHOP, Applebees, most chains like this are a large collection of franchisees. IHOP actually only owns a very few restaurants outright, so the choice is up to each franchisee. This is true of nearly all chains. Keep it out of site and no one will ever have an issue. Be inconsiderate of others and wear it out in the open and pretty good chance you'll be asked to leave your weapon locked up in your car. Don't need a sign. Pretty much every restaurant menu contains the words "We reserve the right to refuse service to anyone". Once asked to leave, if you do not immediately comply you are violating trespass laws and can be arrested. Not up to you to argue, try to change anyone's minds, tell them what they must do in way of signage, you have no rights on someone else's property. Do as asked, or don't and leave, those are your options. No one is asking for your opinion. You want a vote, invest your own money and open your own place. You have no right to dictate what someone else has to tolerate in their own home or place of business. Again concealed carry is the way to go, open carry and you're just being difficult for no reason and hurting someone's business. You have no right to do that.