The nucleating factors of a community are rooming houses, bars, pool rooms, etc.集体寄宿所、酒吧间、弹子房等是社区内的人集结的因素。I was wondering who you were planning on rooming with next year.我不知道你打算明年和谁同住一室。After losing his job, he moved to a cheap rooming house.失业之后，他搬进了一所廉价的出租房。