ATHENS—About now, Charlie Chahine should be welcoming his first international guests of the season to his Suites of the Gods resort on Santorini, Greece’s most popular holiday island.
A few of his staff of 30 would be serving poolside cocktails as guests drink in the island’s famous sunset, his hotel becoming a little busier every day as summer approaches, bringing 2 million visitors to Santorini’s cliff-edged shores.