What should the tour leader do when his group of 50 pax of turned-away from the hotel at 11: p.m. LT on Santorini Island (Greece)?

Take immediate care of children and elderly people; try to accomodate as much tourists from the grroup as possible, using less rooms for more people. Search for alternative accomodation and calm down the tourists. Prioritize. Keep in touch with a resident and travel help desk and office. Make necessary expenses from reserve budget, if needed.