As they arrive, give each guest a name tag, and ask her to tell you, in a few words, how she's connected to the guest of honor. Under the person's name, write an abbreviated version of her response -- for example, "BFCR" for bride's first college roommate. As guests mingle, they can try to guess what the abbreviations stand for.
Bridal Shower Activity: Who Am I?
Martha Stewart Weddings, Volume 30 2004