While unlocking my bike at the racks in front of 55 W. Wacker (on the Dearborn side), I dropped my keys and neglected to pick them up. Around 6:45pm. 

I may also have been dropped somewhere in the bike lane from Dearborn --> Milwaukee ave --> The 606.

I will buy you 100 beers and also provide cash if found. 

They have a leather strap and a wide variety of keys on them, including a pink one.