Also, from Forgotten Ohio, here are some haunted Greek Houses from Ohio University in Athens.
Delta Tau Delta
According to stories I've read, the members of Delta Tau Delta fraternity (which has been at Ohio University since the 1860s) stole a tombstone from the famously haunted Simms Cemetery and immediately began to experience weird poltergeist activity at their house. They eventually returned the stone and were left alone after that.
Alpha Omicron Pi
A slave named Nicodemus haunts the home of the Alpha Omicron Pi sorority. Once it was the Zeta Tau Alpha House, but before that it was a private residence and a stop on the Underground Railroad. They say that when locals found out that the house at 24 E. Washington was harboring fugitive slaves, they stormed it. They managed to find only Nicodemus hiding there, and shot him as he fled through a hidden tunnel. For years after that he haunted the building through its possession by several different sororities. The Zeta Tau Alpha girls had extensive encounters with him in 1972 and 1973. Later it was the Sigma Nu frathouse, then Alpha Omicron Pi; now it's Sigma Phi Epsilon. Do the Greek groups keep moving because of the strange disturbances, or is it just a coincidence? I'd have to say that, if you're a ghost and you're stuck haunting someplace through eternity, you could do a lot worse than a sorority house.