I hang out in a ton of FOSS projects' rooms / bridged IRC channels / other rooms I saw mentioned in discussion. I use it to give and receive support, to learn,

I hang out in a ton of FOSS projects' rooms / bridged IRC channels / other rooms I saw mentioned in discussion. I use it to give and receive support, to learn, and as an occasional break from work. https://view.matrix.org https://view.matrix.org is a good list, at least the first few pages seemed SFW, most populous rooms are first, and you can search by keyword. Once you get into the main room of any large community, check the topic or ask if there's a Space, which gives an organized overview of a community's rooms (in a featureful matrix client like Element).