Meet Jessica, 27, from Henderson, Nevada. She's been working the VIP floor at a strip on the Vegas Strip for four years, and last year she cleared $180,000 in tips alone — not counting her $4.50 an hour base. (Her accountant thought she was joking the first time they met.) She doesn't do anything shady. She just shows up, remembers your drink order from six months ago, and smiles like she's genuinely happy to see you — which, let's be honest, is more than your actual girlfriend does. High rollers don't tip for service. They tip to keep the vibe going, and Jessica is the vibe. She drives a Tesla now and her mom still thinks she's "just getting by." But here's the part that'll make you spit out your drink...