I believe we are to take this woman for a sex worker, watching her client (offstage, left) get dressed and go:

french sex worker watches her client get dressed

With the larger cartoon from Le Rire of which this is but a detail, there is both a caption and a title, in French; the Google Translate on the title is cryptic and on the caption, banal. Presumably a better understanding of them, and possibly of social signifiers in the artwork that I’m not equipped to see, would help me “get” the point of the cartoon. [Update: see the comments, where my erudite readers have taken a good whack at it.] But the room is simple, furnished only with a nice bed, booze, smokes, a wash basin, and a sponge in a basket. That much, even a century later, we understand.

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