"The Westerner thinks a party is a club," says Khalid, a 34-year-old real estate developer in Jeddah. "The Arab party is a majlis . I have one that seats 200. We bring in a live oud player from Cairo, a sushi chef from Tokyo, and a barista from Milan. We eat lamb mandi off gold-plated trays, then switch to Dom Pérignon at midnight."