as far as i can tell there is a few new background characters in the club since i've played a long while ago but no new dateable characters.
i kind of wish they add some interactions at least, maybe just some friendly banter that doesn't lead up to anything romantic or sexual for the currently background only characters,
i think that added depth would be nice and may even increase the value of the already dateable characters because we can compare them and the background characters could even friendly banter about the dateable characters.
but likely wont be done at least for some good amount of time if it ever would be.