I've found that 'static' umbra descs are really the wrong way to go, especially with nWoD/CoD since the umbra is so fluid based on the reality of the situation. The right /people/ in the area can swing the umbra description based on moods etc.
So if I were to do a nWoD/CoD umbra system I'd probably just use anywhere rooms, or have staff alter the desc of the room in the scene set, it's much easier to get what you want without having to worry about static anything. Also, with the way the Umbra has changed, it's a lot easier to get stuff shoved up your tailpipe if you just try to hang out in the umbra all the time and be a spy or whatever, so there's that too.