For social/experimental interviews, I'm going with a more casual version of a suit. Black dress pants, black short sleeve jacket, and a nice short sleeve shirt underneath. I think that the short sleeves make the look more casual, but still professional. My friend and I are having much more trouble figuring out what to wear to dinners/socials in the evening. Our advisor told us it was okay to email a grad student (if we've already spoken with them about travel arrangements) and ask them to give us an idea of the dress code. Then dress a step up from that.
