Well, if you all don't know, there are sororities that cater ONLY to lesbian/bisexual females. There is even 2 sororities who are legally, consitutionally bonded as brutha/sistah. By this, I mean one caters to femmes, agressive femmes, lipstick lesbians while the other caters to soft butch, butches, and dominant women ONLY. So women who have alternative lifestyles have already started sororities that already cater to their needs. From researching most of the organizations, they consider bisexual/bi-curious to be a fad just like wearing low rider jeans. Nowadays, most women's claim to fame is to state that they are bi-sexual rather than choose to live the real life where everything is not so accepting and fun.. Check out the Gay/Lesbian Sorority Links below:
http://http://www.oepi.com/
http://www.gentlewomen.org/
The above two are the constitutionally bonded sororities catering to femme/butch
Here are a few others:
http://www.kappasisterhood.org/
http://userwww.sfsu.edu/~ldlbeta/
http://www.geocities.com/dil_inc_2000/
http://www.betaphiomega.net/