Not campus, but one time the owner of Kathouse was opening up for the day and a guy came in (this is about 4pm or 5pm) and ordered a beer. Sat at the bar and talked with the owner for a bit. The owner went to turn on some lights on the stage and came back a minute later and the guy at the bar was pale as could be. The guy stares at the owner for a while, kind of stutters and finally spits out,
"Have you ever had any weird stuff happen in here?"
"Well, it's a bar. Yeah, we have weird stuff happen every weekend"
"I mean like, ghost stuff"
"Yeah we've had a couple things. The light switches being flipped randomly and stuff like that. Why?"
"I swear to you a guy straight out of the 1950's, with a full suit and top hat, came up to the bar and stood here like he was about to order a drink. I turned to look and see what you were doing, and when I looked back he was gone"
He sat there for another 10 minutes, never touched his beer again, paid for it and left. Owner swears he as stone sober when he came in and only had about a third of his beer by this time.
Since then it's been discovered that someone had committed suicide in that building decades ago. Weird stuff with light switches and fans still happens on a regular basis.