@rienrah Get any socks?
My D stayed in an interest house last year for her admitted student weekend. I think the decision on where to place kids for overnights depends on who they have to host without regard to where the kids live. They have permanent hosts for one-off visits, but they hire many additional kids to host for their “open house” weekends. There’s an application with training and it is a paid (don’t count on earning more than what a couple of Sunday night dinners cost for each night hosted) position. My D now lives in an interest house, but it is housed in part of a dorm.