They carry signs with clever -- and often hilarious -- antigovernment slogans. They chant things like "Russia Without Putin" and "Free Pussy Riot." They listen to fiery speeches by Aleksei Navalny, Sergei Udaltsov, and other opposition figures.
And then everybody goes home until the next protest is called.
Now, there is a growing sentiment among the Russian opposition that street protests like the September 15 March of Millions have reached the point of diminishing returns. Can the opposition move beyond street protests?
A key test will come next month when it will hold online primaries to elect a new Coordinating Council to organize its future activities.
In the latest edition of the Power Vertical podcast, I discussed the primaries and what they mean with my co-host Kirill Kobrin, managing editor of RFE/RL's Russian Service.
Also on the podcast, Kirill and I discussed the ongoing "cold war" in the Russian elite and the possibility of a government shake-up.
Listen to or download the podcast above, or subscribe to The Power Vertical Podcast on iTunes.