Currrently, almost non of the barcelona girls is living in this apartments for real. Sure, there were exceptions (0e.g. Nicole), but most of them stay there like others go to work (and just have this teasing shows).
I also do not think, that the girls get real friends in this apartment a lot, even with them spend so much and very close time together. Best example is maybe Danaya. She told (based on translations) some other girls in the apartment that she lost contact with her "RLC girlfriend" very fast.
I think, it is easy to see that the concept of a girls apartment do not work with the idea of "The private life of other people live in 24/7.". It is more a fassade as anything else. I hope, RLC will find a way for improvement. The current situation is more that useless.