No. 1, as stated, is the Attendant's room (centrally located, and it has the annunciator board so the Attendant can tell who is calling when the call button is pushed). No. 2 is across the hall from no. 1. Directly below them are 11 and 12. These rooms will have the smoothest ride because they are as close as you can get to the middle of the car. Next choice would be 3 and 4 upstairs, or 13 and 14 downstairs. Some say the ride downstairs is smoother because there is more lateral sway upstairs, but I've never noticed a difference. Sometimes it's a bit noisier downstairs because it's closer to the track. There is only one restroom upstairs, but on the other hand that's where the coffee is. There are 3 public restrooms downstairs, plus the shower.
The roughest ride is over the trucks and draft gear at the end (i.e. 7, 8, 9, and 10).
"Ya pays ya money an' ya takes ya choice."
Tom