wouldn't worry too much about the Pitt social event. It's one night for ALL the interviewees....the ones interviewing with you, and the ones interviewing the next day. Approx. 100 interviewees.....so if you already interviewed and met some of the residents, i wouldn't go out of my way to stay. Of all the ones i went to last year, this was by far the largest (meaning, no one will notice if you aren't there). Besides, i'm not even sure the interview really matters....talk to someone you know that interviewed there.