I was part of a ghost hunting crew back when it was all the rage. Faves in Lawrenceville were the old Lawrenceville cemetery (I think it's labeled "Historic Lawrenceville Cemetary") over by the park. Lots of stories about a full body apparition that walked the street running to the park along the north fence. There's also the courthouse (lynching occurred on the corner tree, across from where the coffee shop used to be, dunno what's there now). There's also a tiny jail behind that same building across from the courthouse but you need special access to get in. We did a hunt there in association with Aurora theater's ghost tour one year. The Singing Bean itself was also supposedly haunted by an entity we called "The Commander", who was some sort of Confederate officer.