Fireplaces:
Above the entrance doors (as referenced in prior posts) is a walkup area that has a largish sitting area, fireplace, working desks, and also the doorways to the patio that faces parking. This is on the 4th floor and looks to be the one in the photos above. It has a low ceiling, is quite cozy, and overlooks the lobby (and reindeer during Christmas).
Then if you go around to either side of the lobby, there is an additional staircase from 4th to 5th floor (and I believe again from 5th to 6th if you have CL access). When you get to the top of the staircase, go back toward the entrance side of the building and you are again at a different fireplace, just above the other. It is smaller and only has maybe 2 chairs. But there are lots of large windows up there to let in the light, and you are higher up, so the atmosphere is quite different from the 4th floor.
Of course, there is the very large fireplace in the lobby, and I believe one in the WCC. I don't know of any others.