New York can be an intimidating place for young people fresh out of college. Some find they need to bed down for a few years in something more challenging than a dorm, though not much more.

Among the steppingstone buildings in Manhattan are several tall apartment houses in Murray Hill, like Windsor Court. There, recent college graduates can find themselves among fellow alumni, meet up for familiar drinking rituals and flock to the frozen-yogurt shops and sushi bars that help them stay fit and find a mate for the next stage of life.

Adam Greenberg, 23, knew when he moved into Windsor Court a month ago that he was already acquainted with more than 100 people in the neighborhood, many from the same high school (Wheatley on Long Island), sleepaway camp (Equinunk) and college (Syracuse University) he attended.

“Everyone knows everyone,” he said. “If I don’t know them, I’m sure I have a friend who knows them.”