Hello from Austin Texas!
While visiting your fair city, i spotted this example outside of the Billy Goat Tavern on Michigan Ave thinking it could be a DMF member bike. You have a great town and can't wait to get back for another visit.
(https://lh5.ggpht.com/_CFD-C_T1IRQ/Sezbb8BpbsI/AAAAAAAAIK4/fwzEmiWlPWU/s400/chicago_duc.jpg)
Not sure who's that Monster is.
Chicago has a H U G E collection of Monsters riding around at all times of the year.