fwiw, there's a building my sister lived in in Pittsburgh, the Penn Garrison, it's downtown, not totally sure what the history behind its development is, or what the window related zoning issues are in Pittsburgh, but it has one-bedroom apartments where the bedroom doesn't have any windows.

If you're interested in what it looks like, at least the promotional version of it, https://www.pmcpropertygroup.com/properties/penn-garrison-lo...

If you put enough soft lighting up, it was perfectly fine