Since someone asked me if Qing women went to opium dens, I thought I would answer and put up some of my evidence.
Short answer – I don’t think so, at least as customers. Certainly in the Republic, when they started registering opium “addicts” only a very small number of women registered (although there seem to have been women registered everywhere) In Qing pictures, like the ones below, opium smoking places seem to be male spaces, although we do get a picture of a wife showing up at one looking for her husband. There seem to be female attendants/possible prostitutes smoking with men in the classier place. I also include the picture of Mr. Conspicuous Consumption, which students always like.
These are all from Dianshizhai huabao. Sorry they are reversed. I think I took these from the transparencies I used to use before Powerpoint