Remember that the easiest way to figure out what chapter a girl is from, is to pay attention to which chapter she treats like the plague!
Try to react and treat each chapter (and their alumnae) the same. Last year we had 3 PX's. Each of which did their best to even avoid eye contact. So, just to torture them, I took every opportunity to make silly faces at them.

Meanwhile, PX's from other chapters are way friendly and chit chatting w/ me and our other alumnae.