Lifestyle Ten Awesome Critical Mass Instagram Photos By Shaina Tsan | September 28, 2012, 11:52 pm @justdanika Pages: 1 2 3 4 5 6 7 8 9 10 Tag: Bicyclists, Critical Mass, Instagram, San Francisco From Our Sponsors UPCOMING EVENTS SEP 16 Pulp at Bill Graham Civic Auditorium MAY 16 Cobb's Comedy Showcase at Cobb's Comedy Club APR 27 San Francisco Comedy Attic - Every Saturday at Eclectic Box SF The Best Events Every Week in Your Inbox Thank you for subscribing!