**Critical Mass (since 1997). Last Fridays All ages Free 5:45p.
THE monthly gathering of bicyclists making their presence known downtown. Unplanned route gently winds a dozen miles or more. Thousands attend in good weather. Includes music, hipsters, athletes, show bikes, so much more. Skaters welcome. http://ChicagoNakedRide.org/underwearride Daley Plaza, 773/486-4861, 50 W Washington. Under the Picasso (giant rusty bird), at Dearborn, SW of State&Lake train stop. http://chicagocriticalmass.org MAPPHOTOSEVENTSINFOSHARE
