I went to a rally in Boston yesterday. I'm terrible at numbering crowds, but it seemed like there might have been a couple hundred people. There was a bigger marching protest a couple days before, this one was more of a huddled group of people in one area, reciting chants (BLM, My body my choice, et al.), singing, raising signs, discussing with and consoling each other, writing chalk messages into walls and all over the sidewalk.
It was nice and felt good to congregate with like-minded, equally frustrated people. Despite the cold and wind, it had been going on for about 5 or 6 hours by the time I left.