I could only prostitute myself (if I would accept the black man as my pimp) in the alley.
But we are talking about the special conditions laid out in the spoiler.
Where (according to texts) I turned someone from a (new) special event (in Kellys Pub) into my prostitute and sub.
According to the texts, my new sub would take a room in the red light district and start her job immediately ..
so, of course, I would expect her to tell her mistress (me) the address and, on every visit, give her the shares of her daily work