Did you check
http://www.louisville.edu/rso/greek.html ?
There are 6 Panhellenic sororities at Louisville. The greek life page also lists Alpha Sigma Kappa and Delta Sigma Theta with websites. Two of these sites (Alpha Omicron Pi and Pi Beta Phi) are very current, updated within the past week. Three sites (Delta Zeta, Kappa Delta and Sigma Kappa) appear to have been last updated in December 2002, and one site (Chi Omega) is the only one that appears outdated of the 6 sites.
As for your housing questions, 5 of the 6 have houses and one (AOII) is housed in a multi-room suite. Only one (Sigma Kappa) of those 5 actually own their house and (I believe) the property it sits upon. Not all houses are residential, and those that are hold approx. 6-12 residents, max. The university will be building a new "Community Park" style housing/dorm area, including housing for 5-10 GLOs (see
http://www.louisville.edu/student/vp...munitypark.htm for more info.)
I'm sure you know, things like strongest history/most welcoming/ involved philanthropy/ etc. are both part factual and opinion. Every sorority is going to say "we're the best, we're the most welcoming/diverse/charitable/etc." It depends on what your friend is looking for, and what each chapter at Louisville could offer to her. What ABC might be at one school may and will be completely different for ABC at Louisville <G>.
My chapter is the youngest of the 6, but is celebrating their 20th anniversary this year. Some chapters have been there since the 1920s. Chapters that were incredibly strong when I was in school now aren't as strong. Chapters that appeared to be in danger of closing are now extremely strong chapters.
If you have any other questions, PM me. I'll answer as impartially as possible, although I am and shall remain incredibly biased when it comes to sororities at Louisville.
Christin