Unless things have changed in the last few years, Cal doesn't have a service sorority, or at least one that markets itself as such. (If there had been, I probably would have joined that instead of Alpha Phi Omega...) Cal does have a great APO chapter. Not that I'm biased or anything.
There are also some multicultural sororities that might be interesting if NPC recruitment doesn't work out.
It never hurts to go through recruitment. Even without a bid, you're no worse off than when you started!
