I've heard people recommend wearing layers, as it can be scorching hot one moment and arctic cold the next...
Although right now I'm wondering if women back in the golden age of railroading (the 1950s) wore one of the particular styles that was popular at the time while riding on the train... :giggle:
The train, like almost everything else, was dressier. I seem to remember I would wear a suit to dinner in the diner if I was in a sleeper. I recall there was kind of an unwritten custom of wearing a suit just to check into a hotel, but not thereafter, unless, perhaps at a hotel's fancier restaurants. You look at brochures from those periods and it shows models well dressed.Though I am not sure if it was really that consistent.
Some where in my many boxes of souvenirs I have a handwritten note from my dear mother reminding me to hang up my suit as soon as I boarded my pullman.