After receiving our cabin assignments, we were sent to a roped off part of the platform that had about 50 white plastic chairs. There was still plenty of time before the train departed so I wandered off in search of a drink but turned back to see concerned glances from the guy in charge of the white chair zone. Apparently, his role is that of a muzungo wrangler. It is his job to keep the white people out of trouble. One British couple told me he had approached them when they opted to sit on a bench with the locals and said "No. You sit there." while pointing to his fiefdom.