Any time, day or night. It has to be open 24 hours. That's a tough one. Many of them have the word 'diner' in their title. If we get a bit overwhelmed, we can always change it.
Most diners have neon in their signs.
But there are a bunch that don't. I don't know about that one. There are plenty of diners with no counters. Those little jukeboxes that they have in the booths are nice. Yeah, I suppose.