Exactly, the Chapter houses are all scattered, but there are some "clumps" of a few fairly close together. There isn't a traditional Sorority Row like many other campuses. In the earlier rounds of Recruitment many PNMs would carry comfortable walking shoes in their bags and change between parties to walk to the next house.
Back in my day they ran a shuttle on Pref Night so the PNMs could make the next party in time because the houses are so spread out. The two furthest apart used to be Sigma Kappa and ZTA (no longer there from what I'm told
). I'm guessing it would have to have been a 45+/- minute walk to get from one to the other.