Rush

Hi all. These forums are great~my first time posting. Anyway, I have a couple questions amd I hope someone will be able to help me out. I am going to be rushing really soon, but a couple things about it still confuse me. I know that you go to parties to find out more about the sororities and stuff, and I know that if the sisters like you they invite you back. I have a pretty good idea of what the first round of rush parties are like, I was just wondering what the second round of parties are like...are they just like the first round? Ok, this is my last question. What are the pref parties like? Are they just like the normal rush parties, too? I'm just trying to get an idea of what it's like so that I'm not as nervous. Thank you so much:-)