Among other things, architectural design makes decisions about how space is allocated and how it will probably be used. Of course, architects get things wrong. The dorm I lived in undergraduate did a fair bit well--and also had some common space that was sort of out of the way and was hardly ever used.

But one way or another, an architect is going to design things in a way that (they think) optimizes for certain behaviors and use whether that's socializing/collaborating or the maximum privacy/anonymity.