I live in the suburbs of Atlanta, the Waffle House homeland. When we introduced ourselves to the neighbors, their young daughter made sure we knew where the Waffle House was.
It always amused me when I was younger that you could go to either one at 2am and it would be filled with both kids like me getting some food after a party and truckers stopping for a break. Filled!
I've heard that part of the reason for this is that Waffle Houses only come in one size, so if there's more demand they build more locations instead of bigger ones.