Most of the disturbances occur in Blair Hall. Coats are tugged; people feel smothering sensations; people hear laughter, voices, dancing, even the meowing of cats. Elevators show up when no one is there to call them to a floor. Doors open and close. The janitorial staff is especially aware of the ghosts.
The former chief of security at Sinclair made a few appearances around the buildings after he died, too, so if you go, you might run into him.