Possible pipeline idea: Explicitly leftist tabletop club the links up the terminally online with labor organizers and uses one-off games as a method of teaching people how to organize. It’s basically corporate retreat roleplay exercises but actually fun and voluntary.
Stressing the importance of a trust model is good, but it could also be used for more generic roleplaying too. Everything from agitating to canvassing to writing PR statements could be covered.
I like this as well, when canvassing we would often roleplay with other canvassers to help get comfortable with the "stock" answers we would get. Also could be helpful if trying to do community organization (food drive, rent strike, anti-imperialism campaigns)