That concept art makes me happy. Why? Because it reminds me of one of my favorite Sam & Max locations ever: '80s Stinky's Diner. Granted, it's not exactly a strong likeness or anything, but it has that same '80s-ish look of the diner.
"Always expect the best of others... And watch as your hope is crushed like crackers in a fat man's bed. And the fat man is angry. And the fat man has a sledgehammer. And the fat man is yelling 'DIE, CRACKERS, DIE!!'"
- Rat, Pearls Before Swine