[Question] What are all the AI Alignment and AI Safety Communication Hubs?

For effective work on complex topics, multiple people need to work together[citation needed].

For AI Alignment, LessWrong and its sister site, the Alignment Forum, are arguably the Shelling points. But there are other platforms that, for one reason or other—language, culture, size, personal preference—are better suited for individual contributors.

On Being an individual alignment grantmaker, the following platforms were mentioned:

Next, I increased my surface area with places which might have good giving opportunities by involving myself with many parts of the movement. This includes Rob Miles’s Discord, AI Safety Support’s Slack [named “AI alignment”], in-person communities, EleutherAI, and the LW/​EA investing Discord, where there are high concentrations of relevant people, and exploring my non-LW social networks for promising people.

Other such hubs that I know of (all only with tangential AI safety focus):

Many channels require an invite. If you post additional hubs, please mention if an invite is needed and how one might get invited.