My great-aunt and grandmother were members of high school sororities. I have my aunt's sorority ring from 1925-- her letters were 'gamma delta phi' and I've not been able to find any info about them. There are some old photos of her and her sisters wearing the old-fashioned black bathing suits with their letters! I hope those photos haven't been lost to the ages because they're so cute--- I'll have to ask my mom if she has them.
My dad told me that my grandmother and her sorority sisters used to have a lot of get togethers and activities when he was growing up.
I learned all of this years after I pledged ADPi-- so much for being the first sorority woman in the family!