Lifestyle Ten Awesome Critical Mass Instagram Photos By Shaina Tsan | September 28, 2012, 11:52 pm @madamebovet Pages: 1 2 3 4 5 6 7 8 9 10 Tag: Bicyclists, Critical Mass, Instagram, San Francisco From Our Sponsors UPCOMING EVENTS MAY 04 San Francisco Cinco De Mayo at Mayes Oyster House SEP 16 Pulp at Bill Graham Civic Auditorium MAY 08 Josh Gondelman at Cobb's Comedy Club The Best Events Every Week in Your Inbox Thank you for subscribing!