White Castle was America’s first fast food hamburger chain, and it’s often credited with launching the country’s burger obsession, with its small square steam-grilled sliders. They’re sold in packs of four, sacks of 10 and even cases of 30. The company calls its fans “cravers” (Harold and Kumar of the 2004 cult movie weren’t the only ones!), and every year new devotees are inducted into the Cravers Hall of Fame.