You don't have to party or drink just because you are in a sorority or fraternity. There are many girls in my sorority who don't drink. Drinking is your choice. I am in a sorority I still have my strong christian values I don't drink. You don't have to go to parties either. your argument is not very strong at all.

""Christian Greeks" how can you stay in the org when it sponsors, pays for, promotes and advertises events that God abhors????"

Why did you ignore this statement? So I guess it is okay to be in a sisterhood where girls do drink, party, fornicate, curse, etc.???????? I Corinthians 15:33 says alot about who you should even hang out with, let alone come into covenant with.