Then you should talk to Margaret Hicks from Chicago Elevated. My friend Stephen Reginald from the South Loop Connection blog highly recommends her. He took her red light district tour (who knew there was a red light district here?) and liked it so much that he decided to write a post about it. Here is the link to his post about his experience with Chicago Elevated tours: http://southloopconnection.blogspot.com/2011/06/chicago-elevated-chicago-history-with.html. By the way, anyone living in the South Loop should check Stephen’s blog. He does a very good job at promoting this community and the businesses in the area.
Chicago Urbanite 
Thank you so much Claudia! So glad to be interfriends!
You are welcome Margaret! Let’s keep in touch online and offline 🙂