MASS 
 Lauren Sailor farewell mass. - Fri 6/24/11 5:45p
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Chicago Critical Mass
Lauren Sailor farewell mass.
Fri Jun 24th 2011 5:45p

Critical Mass is a very large group bike event, gathering in Chicago the last Friday of every month for more than a decade. Leaves Daley Plaza downtown around 6pm.
ChicagoCriticalMass.org
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