I am business casual if meeting with some admin or when teaching. IF I am just on campus for some reason or just holding office hours - I will wear shorts or jeans and sweatshirt. The students wear suits if interviewing or in a clinic with a court appearances - otherwise they dress like toddlers who have no adult supervision. Men in particular tend to do things like wear flip flops in icy winter time classes because they lost their shoes or jammy bottoms because they are saving up a semester's worth of laundry to take home for spring break or something.