This is a build or test lab, not the offices of developers. I visited multiple times in the period mentioned for the picture, and saw multiple of these. The one I saw most often was the NT build lab. When I started there in the mid-2000s, these labs were still used, although the build labs were a little less densely packed thanks to remote tools.

Yep looks like the build lab described in the book Showstopper. I think there were even photos of this room in there.