I do think it’s worth dedicating sustained attention to the question of what an inclusive, invitational “active club for the left” would look like: something that would serve to (a) get people out of their heads and back in their bodies, (b) give them a feeling of belonging and togetherness, and (c) equip them with the means and bodily capacity to resist violence.
Various martial arts traditions seem to offer a partial precedent, famously capoeira and t’ai chi, and extending as well to certain forms of aikido; I myself could see something founded in long-distance trail running. It bears thinking about.