AKA, DST, SGRho, and ZPhiB don't participate in these types of events. Your best bet is to visit the national website for the sorority you're interested in and review the membership sections.
If you're still in high school, it doesn't hurt to talk to your teachers and ask them about their sorority and fraternity experiences. I went to a 99 percent black high school and all of our Greek teachers loved talking to us about their orgs.