Its not just In Indiana we recently mover from Indiana to Tennessee being new to the area we were looking around and decided to stop in at a Papa Johns and right on the front door was a no firearms allowed sign. In Tennessee the sign carrys legal weight. Not that I have a problem with private property rights however we decided not to go in because of the sign. Ultimately we emailed the franchise owner who told me "yes we do not allow guns in Here for the safety of our employees. He could care less and was not willing to have any discussion regarding the policy. I thanked him for his time and let him know that he did not need to worry about us carrying in his establishment because we would never purchase another piazza from Papa Johns again. He seemed not to care at all about the lossnof our business. Funny thing is we found another piazza place that had much better piazza at a better price and they actually appreciated our business.
I don't know where you are or if they're still in business but if you're near Knoxville---Stephano's is an excellent alternative!