I don't mean this to sound bad, but I don't think people are that skinny any more.
Then you may be interested to know that 80+% of the outfits I saw would fit right in at a high school as of 2 years ago. About 50% of that 80%, or 40% overall, would be whenever students were dressing up for some reason, whether on a game/concert day, or if they just felt like it.
Edit: Formatting, because I can't do things right the first time.
Looks like that office can't possible be as cold as modern offices. I would freeze in dresses like that in a modern workplace.
I remember raised-floor machine rooms being distinctly colder than office space. But more importantly, none of those shoes are barnyard acid resistant.