Coffee mugs rattle, silverware clinks, and the grill is sizzling. You weave your way through the packed tables, refilling customers' water and delivering steaming hot plates piled with burgers and fries. Ten years in the biz, and you've got this dance down to a T. Your muscle memory serves you well as the crowd thickens. You juggle orders, argue with the kitchen, and wish your coworkers cared about their tips as much as you do. Why does it seem like you're doing everything alone? By closing tim…