In heart of the colorful Strip District in Pittsburgh, Pennsylvania, stands Kelly Os Diner - a half-mirrored, half-muraled building that serves up the best fried eggs and diner coffee in town. You might know it as the family-friendly greasy-spoon featured on Diners, Drive-Ins,and Dives, but what this spot is *really* famous for (other than its haluski) is the positive atmosphere it fosters among diners. Case in point: a 60-table pay-it-forward chain that lasted for three days.

It began when one table paid for the meals of three local police officers, who in turn paid for five others... and on it went through the weekend.

Courtesy of @KellyOsDinerPGH

"If you treat everybody as you'd want to be treated," says owner Kelly O'Connor, a Pittsburgh native and figurehead to her community, "it makes a big difference."

If you're in the area, we recommend the Eggs Benedict. If you're feeling inspired, pay something forward next time you're able. Or check out these food-focused non-profits that help feed those in need.

• 412 Food Rescue
• The Greater Pittsburgh Community Food Bank
• Feeding America