I can't believe I didn't pull up this thread when it happened...
I stood up in a wedding last month for my roomie from the chapter house. Her maid of honor was a Gamma Phi, as was another bridesmaid. Some of our chapter sisters came to the wedding early to drop off some things we needed and they were wearing letters and had stickers on their cars, which the woman directing parking - she got all excited and told them she was a Gamma Phi from the Epsilon chapter at Northwestern, pledge class of 1962. Turns out her family owns the arboretuem or something like that - we included her in one of our pictures. It was so cool for us to run into another sister like that.