I certainly haven't heard about his practice GPhiBltColonel (although I think I have a pretty good idea about which house you are referring to
. Our rho chis reccommended asking questions about living in the house and I remember in several different houses I was asked if I had any interest in eventually living in a house. THese days, I iknow that at USC many of the largest houses, the only girls living in are sophomores and exec board. Juniors and seniors usually choose to live out so that they have more freedom.
However, if this is a concern, PNM's may want to ask their rho chi's about such a question to see how it is thought of at their school. And like GPhiBLtColonel said, there are other ways to ask this question such as "how many girls live in the house" or asking the girl you are talking to if she lives in the house and if she likes it.