Thanks for the info! I looked up my mom's sorority and it's similar to what you said. It's good to know I will be invited back at least somewhere! Lol.
As per competitiveness, I've heard there are a lot of fun, good-looking girls at UCSB (mostly from guys, haha)... I am pretty good at talking to people I don't know so I guess that helps me a little. Even if I don't get picked (or whatever it's called?) towards the end, it will still be fun to go through rush to meet new people.
