NEW YORK TIMES: New York City was home to nearly 1.28 million people in their 20s last year, up from 1.21 million in 1980. In many respects, Mr. Cavin Quezada’s situation mirrors the way large numbers in that age group are living, three years after the Great Recession began. They are doubling, tripling, quadrupling and even quintupling up. According to the New York City Planning Department, 46 percent of New Yorkers in their 20s who moved to the city from out of state between 2006 and 2008 lived with people to whom they were not related, up from 36 percent in 2000. Even young people in high-paying fields like finance have to make sacrifices. There’s the investment banker who can afford only a 450-square-foot studio, and the financial analyst who lives in a third-floor walk-up studio illegally divided into two rooms. Still young adults swarm to the city, especially those eager to pursue careers in finance, the arts, media and other fields for which New York has long served as the nation’s heart. They come to find work, to find one another and to hang out in neighborhoods like Williamsburg and the Lower East Side that have become almost geographic extensions of college dorm life. Here are some tales from the front lines. MORE