City Of Spies-The capitals of the various powers are a lot of this, but the huge example of this is Melvin’s Reach, which sits in an absolutely perfect location between the four major powers.  Besides being a hub for shipping and travel, it’s also become a hub for all of the espionage services, either setting up spy rings into the other powers or keeping an eye on the competition.

It hasn’t gotten to the point of requiring carpools for surveillance tails, but you can safely assume that every third person you meet is in the Great Game somehow, all of the good dead drop locations are either in use or under constant surveillance, and it is never just the wind.