I counted 20. The group was already well underway when I arrived, and a few more people showed up after I got there. Discussion was animated and morale was high. One lady I've known through the group for a while lives in downtown (SE) Portland; she can hear the riots every night. ("Just follow the smell of tear gas," she quipped, "and you'll find my house.") I got talking with another woman, a young single mom, and it turned out we both went to the same demonstration at Terry Schrunk Plaza a couple of summers ago!
The meet-up went strong for a good three hours and more. There was a good mix of familiar faces and new ones. It was the most in-person social interaction I've had in a while, and it was good to be with friends that I have things in common with.