In need of members, and other problems

I am a part of a Sorority at a small Church related College. We have three "social" fraternities, two "social" sororities and this comming spring we will be inducting a third sorority to the mix. Both currently existing sororities are having a problem with numbers. Our sorority has it the worst. We are Service orientated. We come from diverse back grounds and we all get along very well. We Are hailed by most faculty members as the most behaved greeks on campus. We are liked by most of the "cliques" on campus, and yet we have only six members as of next semester. T can quote people as saying we seem to be such good friends, people that they would like to be sisters with, and yet the numbers stay low. The situation looks bleak, but we won't give up without a fight! But we're not sure what exactly to do. If anyone has ideas, we would graciously listen to any advice given. Can you help?