Working as a server sounds fun in theory; the free food, cash tips, and you basically get paid to talk to people all shift. But then you get stuck working the dinner rush, when all chaos breaks loose, and you find yourself dripping sweat as you run from table to table while getting an earful from the non-avoidable Karen customers. Some customers are lovely and understanding, but then there are the ones who turn a small mistake into a full-blown screaming war. We’ve all seen it—the over-the-top…