Usually, the amount of uninhabitable rubble or impassibly toxic ground separated have from have not pretty naturally, but there were some super dense cities where neighborhoods still tended to meld into one another.
Invisible Order was the company that hit the jackpot in places like that. It’s just rumors, but supposedly, don’t even bother applying there if you weren’t special forces somewhere. They’re supposed to allow their clients to go about their daily business with no interruptions. Look at someone writing them a paycheck for too long, and there’s going to be five or six guys in black jackets, very professionally cracking some important bones.