Real news traveled fast, even in the days before internet connections. During the New Deal and World War II, Washington elites turned to Hope Ridings Miller's column in the Washington Post to see what was really going on in town. Cocktail parties, embassy receptions and formal dinners were her beat as society editor. "I went as a guest," said Miller, "and hoped that they'd forget I was a reporter." In Washington's Golden Age, Joseph Dalton...