You all definitely have some beautiful houses!! Some of my faves at the U. of Washington are:
http://students.washington.edu/panhell/AChiO.htm
http://students.washington.edu/panhell/AGammaD.htm
http://students.washington.edu/panhell/DeltaG.htm
http://students.washington.edu/panhell/GammaP.htm
http://students.washington.edu/panhell/KAlphaT.htm
http://students.washington.edu/panhell/KappaD.htm
http://students.washington.edu/panhell/PBetaP.htm
Okay, so I should have just put all 16, I know! They're all beautiful. Someone else already posted the Chi O house on this thread, but I might add that it is the largest fraternity/sorority structure west of the Mississippi
And to answer the other question, i'm not sure how many girls all of the sororities house..but I know that we at DG have about 85 in-house, and then the seniors have their own annex.