etienne,
Everyone gave you really good ideas. One of the fun food get-to-know-you games we played was with bubblegum. I played it when I was a rushee ages upon ages ago.
There's this big bowl of bubblegum balls. Everyone sits in a circle and each person has a few seconds to say something about themselves and then grab a gumball and stick it in their mouths. Well, the "winner" (no prize, of course) was the person who had the most bubble gum balls at the end. Though perhaps the real winners were those who couldn't think of something to say quick enough and got out. Then their mouths weren't stuffed with 8 gumballs! Well, our tongues were all died different colors by the time we got finished, but it was fun and the sorority members could hear things that were most important to you.