GHANDI, born a Hindu, once said: “I am also a Christian, a Muslim, a Buddhist and a Jew.” Most people will never achieve such enlightenment (or spout such pious tripe, if you are of a less reverent turn of mind). But such thinking certainly creates an opening for innovative programmes like “Muslim for a Month.” No, really. There is an organisation that invites people of other religions or none to come to Istanbul and live as Muslims for a month. Well, not a month, exactly: the nine-day “Explorations” programme costs $900 and the 21-day “Ruminations” programme costs $1,890. “We like...