Peter's is always packed with people on weekends and sometimes on a weeknight it's lined up like a movie theatre with nothing to explain for it at all except that they make pretty decent original hamburgers. And their wide variety of milkshakes probably helps, too.
I've eaten some good burgers in my day and these ones are right up there with the best. They actually throw a patty and half on a delicious bun for a single burger covered in their famous sauce. The women who work there look like old cafeteria ladies with hairnets and pastel uniforms, but it gives Peter's a timeless feel. It kinda reminds you of the 50s and I don't imagine they've changed much since they first opened. But they don't have to, they've perfected their system and their burgers.
Everyone in this city loves these burgers. They can't all be wrong....