I have been in IT for 35 years and counting, all of that in Higher Education. I have NEVER seen anyone show up in pajamas in any capacity, faculty, staff or student
Now, early in my latest job, they "encouraged" me to wear dress shirts and at least khakis. Tried it for a short time, but I have pretty much worn primarily jeans and a polo for most all of the 35 years. I will do the business casual for meetings if I have to, but that doesn't happen often.
