I had no idea this is how Joy Division got its name. Alan Moore says in the From Hell source notes that Victorians called prostitutes “Daughters of Joy” because it was easier to pretend that prostitutes did their work out of sheer enthusiasm than to admit the ghastliness of lower-class economic conditions. Moving onward thru history:

… we arrive, by grim and etymological process, at Joy Division, the name given by the Third Reich to those female Jewish concentration camp detainees assigned to the prostitution detail.

Wow. At least, as yet, there isn’t a movie on the subject, one not starring Natalie Portman and a blond male ingenue with sensitive features to play the Nazi.