This was the Turquoise Room. A section of one car separated by accordian doors on both sides with a hallway bypassing the room (the window slats behind the boys show the hallway from the room, but people walking the hallway can't see in. This room was for movie stars, corporate execs and prominent politicians. It had its own porter and it was very close to the kitchen, so personalities didn't need to leave at all - except to go to the bathroom.
We took a little ride in a caboose. Mostly the public was not allowed in this part of the train as it was for workers only.
Jake was sitting in the Trainman's seat in the caboose. Here one can get a pretty good view along either side of the train and probably try to scare the boys who stood and watched as the train went by (or rather those boys who did a bit more than watch - throwing rocks at the train or getting closer to the tracks than they aught).