My dad and I stopped at this little diner on the way back from visiting Construction Junction one day. We just kinda liked the looks of the place - an honest-to-goodness Atomic Era diner.
Diner aficionados will love this beautifully preserved and fairly rare National brand diner manufactured in the 1940s. The stainless steel and dark-wood interior is glorious with its Formica counters, tile floors, winged clock, and Art Deco elements; it even has the original small bathrooms. You can sit at the counter on stools or in booths on the side.
Dad and I were blown away by the greasy goodness of our meal: cheesesteaks with super-fresh bread, tasty strips of steak and onions, and perfectly melted cheese, not to mention the delish fresh-cut fries! They are known for their "Roethlisburger sandwich" - sausage and hamburger with egg and American cheese. The rest of the menu is pretty standard diner fare: loose meat, cheese, and mushroom sandwiches; fries; and salads. Simple but oh-so-good.
If you are a fan of diner architecture and/or diner food, Peppi's is well worth the trip! I've also been to the north-side location, and the food is just as good, though the surroundings are not as cool (it's not a prefab diner but a regular restaurant with wooden booths). The north-side staff is fun and friendly, and the soft drinks are bottomless.