Around 20 bicyclists loiter around the fountain in the center of John Fremont Park at 16th and P Streets, resting on park benches or milling about to chat with other riders.  A small group huddles around one park bench, where rider Danny Gutierrez is passing out t-shirts printed with an arresting graphic: a car, surrounded by a circle of bicycles, framed by the slogan, "¡La revolución no será motorizado!" -- "The revolution will not be motorized!"  Another rider is passing out fliers with links to the Sacramento Critical Mass Google Group: groups.google.com/group/sacramentocriticalmass.  It seems every time an anxious rider checks his watch, a couple more riders ride in from the Starbucks