I've seen that before, but not since high school! Mostly with the girls' sports teams before a game.... something like this where everyone is standing in a circle, clapping, and bopping up and down:
Group: Jump out, jump in and introduce yourself!
Someone steps into the circle: My name is Amy!
Group: Yeah!
Person: I like to cheer/dance/softball/etc.
Group: Yeah!
Person: Now meet my girl, Betty!
Group: Betty! Jump out, jump in and introduce yourself!
And so on.
At my school, Bid Day starts with a theme at each sorority that lends itself to T-shirts and decorations. There are hand-held signs (glued to paint sticks) in the shape of the theme with each PNM's name on it. The sorority waits in a block for their PNMs waving their signs. The PNM finds her sign and that's her Bid Day Buddy. There are activities on the lawn outside the house ranging from professional photos to Bounce Houses, music, etc. Inside, there's food. It's just fun and chaotic. Each pledge class takes a professional photo as well as the entire chapter. And each class takes a silly group shot as well as a silly all-chapter shot.
One year, my alpha class decided we'd wear togas for our silly shot. Of course, we decided this 3 minutes before the photo

Another alpha class tied their t-shirts so their tummies were exposed and the front row wrote out "I Love ADPi" in marker on their tummies. The rest drew lions, diamonds and violets.