On the 27th of May, a Critical Mass bike ride took to the streets of DC with well over 50 riders. Although nowhere near the size of the DC Bike Parties that can attract up to 600 riders, the Critical Mass rides are still taking place. They began in late 2001 and currently leave Dupont Circle shortly after 8PM on the last Friday of every month, the international day of Critical Mass rides. They have changed much since their anarchist and antiwar origins in DC back in 2001, but the core concept of a swarm of bikers taking to the streets remains.
Video of the May 27th Critical Mass including (at end) a car driver trying to order all riders off the street only to be shouted down