2 sororities having a social/mixer

[kddani]

Now on the actual topic-
At Pitt this is done quite often.
Sometimes two sororities and two fraternities will have a mixer- we call it a combine.
But at least once a semester we're supposed to do something with just another sorority- we'll usually do a member ed type thing. Last semester we cooked breakfast and had an ME on eating disorders (i think) with Sigma Delta Tau.