Everyone likes to rip on Cali (myself included)... but we should also turn some attention to Denny's. I have never been to a Denny's restaruant where I didn't sense the presence of an unstable subculture. I have been to multiple Denny's in IN, NY, NJ, IN, PA, OH, VA, GA, and FL... all have that uneasy aura about them. The food is good and cheap, but the environment leaves a bit to be desired.
An interesting stat would be how many police responses go to each chain of restaraunt annualy for some type of public disturbance. Waffle House can't be far behind.