As the weather warms up, you might find yourself staring out an office window, daydreaming about what you'd rather be doing: lazing outdoors, perhaps, on a large blanket with a picnic bounty spread before you. In fact, people have been fantasizing about picnics as a return to a simpler life pretty much since the dawn of urban living, says Walter Levy, author of The Picnic: A History. "Picknicking coincides with modern history — the shift from pastoral to urban living, the decline ...