Ritter's might be one of the only true, old school diners left in Pittsburgh. And I absolutely adore it. I get the impression that most of the waitresses at Ritters have been employees for multiple decades, as well as most of the cooks. The food is classic hearty diner fare, the prices are low, and the ambiance is everything you could ask for, plus it's open 24 hours a day. Definitely worth a try.