Reminder that social.coop has a Matrix chat channel as well. Using the Riot web interface, it's kind of like Slack, but open source :).
Or kind of like IRC, but you don't have to set up your own bouncer to keep logs for when you're away, and the web interface is nicer.
I am 'Xirzon' over there:
social.coop is a a coop-run corner of the fediverse, a cooperative and transparent approach to operating a social platform. We are currently closed to new memberships while we improve our internal processes and policies, and plan to re-open to new folks when that work is complete. [9/2/2018]