About a year ago I had a relative visiting and we stopped in at Johnny Rockets for a hamburg and hotdog. The floor was filthy, there were a couple of buns half under the counter and the area was generally very dirty. As a result the visitor asked if we could leave as he was not comfortable in such a dirty place. We cancelled our order and left and have not been back since.
It is a shame that a couple of places to eat have so little respect for their business as to not take the time to keep them even basically clean.