MASS 
 Full Moon - Fri 9/24/1999 6p
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 72F NW4 Clear 61h
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UndieMass
Full Moon
Fri Sep 24th 1999 6p

Critical Mass is a very large group bike event, gathering in Chicago the last Friday of every month for 15+ years. Leaves Daley Plaza downtown (50 W Washington St) around 6pm.
Contact: David Z.
ChicagoCriticalMass.org
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