CHICAGO—Citing the upcoming lunch rush, Golden Griddle waitress Kathy Perry interrupted Derek Whamey's meal Monday to ask him—one of four diners in the restaurant—to move to a smaller table. "If nobody's gonna be joining you, hon, we'll just scoot you over to one of those little tables over there," Perry said as Whamey gathered his water, orange juice, and Diet Coke glasses to move them across the room. "You're alone, right? Okay, just let me know when you need the check." Whamey then continued to eat his meal alone.