“The news that the French President, François Hollande, cancelled a lunch Thursday in Paris with the Iranian President Hassan Rouhani … because the Iranians insisted that no wine be served at lunch, is generally being treated in the spirit of what I used to call the Sacre Bleu! Division of the Oh-Là-Là! School of Foreign Reporting from France.” Yet, writes Adam Gopnik, “the dispute touches on a real issue, worth pursuing: what is owed to guests who see the world differently?”