I liked White Castle when we lived in NJ. Something perversely tasty about those tiny patties grilled over onions.
My favorite growing up was White Castle.
McDonald's and White Castle are my favorite.
I'll add my 2¢ and include White Castle on my list. For 74¢ you get a small hamburger that tastes good, is somewhat greasy and slides down without too much chewing (they're nicknamed "sliders"). Eat a dozen of them after having a few drinks and you're good to go.
Pros: Cheap, tasty, fun to eat
Cons: Most of the side orders are not very good (their french fries are TERRIBLE, although their onion rings are passable)