Plan B went into full effect at the 6th Plan JP/Rox workshop last Wednesday as 50 protesters marched into the room clapping. Just as the emcee, Senior Planner Marie Mercurio, was concluding her opening remarks, the protesters grabbed what they called "the people's mic" to "fight not for profit but for the community." For over an hour, "Keep it 100% for Egleston," a well-organized and well-rehearsed group, listed its demands to stop the Boston Redevelopment Authority-sponsored Plan JP/Rox for three months. Plan JP/Rox is a once-in-a-generation rezoning process for the whole Washington Street and Columbus Avenue corridors in Jamaica Plain and Roxbury. The protest group, which is comprised both young people as well as adults, alternated speakers using a call-and-response format.