^My family once had 4 kids in a one bedroom apartment. My "room" was a mattress in a closet that I shared with my sister! By high school it was just me, my little sister, and my mom, though, in a house, so I got my own room at 13. I shared a room my freshman year of college, but moved to an apartment off campus after that and have had my own room, with several roommates, ever since. I don't think I'd be happy sharing a room these days!
I have three roommates, but it's a 4 bedroom/2 bath apartment. Unless one is wealthy, you can't really live on your own in NYC without roommates. At least not anywhere decent.