For three brilliant seasons, HBO’s The White Lotus has skewered and satirised the beyond-belief world of luxury hospitality – and viewers can’t get enough. But is serving the wealthy and powerful as scandalous as the show makes out? From £100,000 a night rooms to Hollywood A-Listers behaving badly to sourcing drugs for high-profile clients, three former staffers from the world’s most exclusive hotels share what really goes on behind closed doors.