Just to let you guys know, from the SDN interview feedback page, previous years' applicants mentioned that some interviewers asked them whether you are staying with a student host or not. It won't be frowned upon, but it seems like they think it's great that you are trying to get to know the program more by staying with a host. They seem to give high priority to "Why Tulane" "Why New Orleans" questions and also seem to ask what you have done since coming to New Orleans. In short, they are very proud of their school and want you to like it also.