When the organizers circulated through the crowd and advised us that the permit time had expired, we strolled away of our own volition.
We ringed City Hall plaza in Waltham, as well as across the street along the same block. Two estimates I heard placed the crowd between 2,000 to 2,500.
Your mileage may vary.
Washington, DC branch - is there a severe thunderstorm warning in your neck of the woods today?