That was barely more than a room I rented when I was a student. It was barely large enough to fit a bed and a table (and an easel, as I painted a lot), and the walls separating the 'apartments' were paper thin and I mean real thin paper: one could press with a finger and the so-called wall would bend :p
It was a pain to live there because you can imagine there was no such as privacy. But it was also great because we were all very young (save one 'old' dude... that was younger then I'm today), and being young and being forced to knew each other and live so close to one another, well, a few of us learned to knew each others a lot more and we shared a lot of good time.
So, to answer your question: that was the undisputed worst place I lived in. It was also not the worst memories ;)
Verre d'eau, suivi d'un café (ou deux).
Thé en journée.