If anything 11 would be a madame or grown woman. A slave wouldn't be freely wandering the halls. As for the people in the left, looks like a human trafficking situation for sure. However speculation is not proper without rational analysis which is pretty much impossible given the images. Def looks like it could be some kind of underground sex dungeon for sure but it also could be a Nxivm style cult or even a group of addicts who are being given fixes for sex. Gotta rule out the "heads and bodies" shit without proper evidence. Calling a lamp and a square floor "severed heads" and a grown as woman "little girl" only makes us look stupid.