Morning in America, not yet six o’clock, and a couple of working stiffs, in the bright early glare of New York, are finding it hard to make a start. One of them is a crane operator, down at the docks, beside a U.S. Navy vessel. “I feel like I’m not out of bed yet,” he says—or sings, in a baritone as slow as a bear. Way uptown, close to the 181st Street subway stop, someone else has the same problem. “Lights up on Washington Heights, up at the break of day, I wake up, and I got this little punk I gotta chase away,” he says—or raps, in a voice as crisp as an apple. The first man, who is unnamed, initiates “On the Town” (1949), and the second is…