A Supernaturally Awesome Business Opportunity

Atlanta has enough credulous residents (or tourists) that there exist actual businesses whose sole function is to give "ghost tours'" of allegedly haunted spots. I'd really like to ask one of those tour guides about the timeline required for the tragically dead to turn into a ghost -- local haunt-lore is all stories like "This spot is supposedly haunted by the spirit of a woman who died in the Civil War" or "the first black man murdered by a lynch mob in Georgia."

None of them cover more recent tragedies, a la "Here there once stood a trendy nightclub where, in 1979, a man overdosed on cocaine snorted off a supermodel's bare ass while Donna Summer's 'Love to Love You Baby' played on the sound system. Some say that on cloudless nights when the moon is full you can still hear his voice, talking very very VERY fast and saying 'Oh my god darlin' you're so hot and I really really wanna do you but I'm having trouble getting it up right now you think you can lend me a hand sweetheart Jesus CHRIST but you are FINE my wife doesn't understand me BARTENDER gimme a shot of Glenlivet for the li'l lady here...."