Thanks Corbin Dallas and Missy for the additional information. This has really cleared up some misconceptions on my part. Based on what you both have said I can see why current active members want to make sure they have a decent size pledge class to fill the house. I also always assumed that people that lived in Sorority or Frat houses lived there for free..you know, just pay your dues and the 'free' room was a perk of membership!
Let me ask you this question...why does housing play such an important role in your ability to attract new members? Do you feel that some people are just attracted to the gliz and glamour of a beautiful house and not to the organization itself?