Yes what everyone else said! Do keep an open mind b/c when I went through rush, I had my heart set on one sorority, while I didn't have an issue with the other chapters, I knew I wanted to be in that sorority. However, rush happens and let's just say it truly opened my eyes. Go in expecting nothing and hoping for the best. It helps you to have a good attitude and a better outlook for the whole process. Most of all, you can have a great time when you are there b/c in the end (whether you get into a sorority or not) it's all about meeting people and making friends while having a blast at the same time.
Good luck and enjoy recruitment, it's truly an experience!