Saw a show on one of the local PBS channels here about the county hospital, and wouldn't you know, they showed a picture of one of the wards:
A ward isn't the ideal place to be, but it was common years ago to have wards in hospitals. I stayed in one when I was a kid. There was no notion of private rooms until much later.
Another interesting thing is the county hospital here in Los Angeles was built in the 30s and at the time it was state of the art. So when Bukowski was there it was 20 years old, yes, but probably not quite the Dickensian place he describes (there were no basement wards, for example, as he says he was in).
There was also no air conditioning in those days, so it had to be pretty awful inside there a lot of the time. They said the hospital held 1650 patients, and that today a large hospital holds about 600.
The 13th floor was a jail ward, where all the prisoners from Los Angeles county were taken.