I have a friend at BG who loves it, she's in a sorority there (can't remember which one though, last time we talked was before I was in AXO, so I didn't pay attention to the letters..
), and my sister just took a campus tour and LOVED it (she's graduating next year). I don't know if she's even thinking about greek life, but I'm hoping I won't be the only one on either side of the family who went greek, and she's a legacy now, so she has no excuse!
Seriously though, it won't hurt to go through formal rush, even if sorority life ends up not being right for you, you'll meet a lot of awesome women. Besides, you may be older, but you're still entering your first year there, so I don't think age will be a problem. I rushed when I was 20 and really regret not doing it sooner, but I was a junior at the time. Also, would you want to be a part of a group where they didn't want you solely because of your age? If people are going to cut you because of that, you don't want to be associated with them anyway. Good luck with whatever choice you end up making, you'd be a great addition to any chapter!!