The pre- interview dinners are typically very informal, but are nonetheless a very important part of your "interview." Much of the feedback that we residents give to our program director is based on our interactions with you during the dinner. This is how we get to know you and decide whether we could get along for the next three years. We do "take attendance" and the PD wants to know who attended and who did not. That may sound harsh, but it is a tangible way to gauge your interest in the program. I think it is equally important for you to go to get a sense of what the culture of the program is like and whether you would enjoy working with the residents you meet there. As an interviewee, I had a lot of fun meeting residents, other applicants, etc. during these dinners. They are also a good way to calm your nerves a bit and settle in before interviews the next day.