All of the chiefs from last year were able to enter the fellowship they desired. That information can be asked when you interview. I remember CT in chicago, Trauma at UPENN, Vascular at RWJ, and I don't remember the other 2.
As for being single many of my senior residents were single. I would also run into them when I went out. RWJ is 1 block away from Rutgers College Campus. New Brunswick contains Rutgers University. There are some married residents.
I mainly remember the residents hanging out together. NYC is also 55min by train, the station is 1 block from the hospital.
Its not NY but it has its own flavor.