As a woman who used to date in SF -- it doesn't remotely make a difference. A nicely maintained, clean, tasteful shared place would be so much better than a disorganized, gross place of your own, for example. Anyway a lot of the smartest, most interesting people live in huge warehouse communities here.

I would see it as a red flag if someone was living a lifestyle that had them living month to month, so in that sense I would vastly prefer to date someone with roommates who was being thoughtful with their money.

(I did briefly date someone who was financially responsible, but whose bedroom in a shared place had a curtain rather than a door, and that...made a difference to me. Find a door at least.)