1416182219_9625197_ver1-0_640_480Several dozen people gathered in a dim church basement here on Thursday night to share plans for what to do if a grand jury chooses not to indict the white police officer who shot Michael Brown, an unarmed black youth, three months ago. Among their ideas was to descend in large numbers on the nearby county seat of Clayton at 7 a.m. on the day after the grand jury’s announcement to snarl business. A day earlier, a different group, chanting “no justice, no profit,” met in St. Louis to announce it will boycott the region’s retailers during the Thanksgiving shopping period as a response to Mr. Brown’s death. Since August, a disparate array of demonstrators — some from longstanding organizations, others from new groups with names like Hands Up United and Lost Voices — has been drawn here to protest not just the shooting of Mr. Brown, but also the broader issues of racial profiling and police conduct. More