Here are some popular1 places to chat about Tezos
Riot / Matrix
riot.tzchat.org is the Riot host for the new tzchat.org server in the Matrix federation, home to chat rooms with the bantering of Tezos OGs since early 2017. Register there for a tzchat.org account; login and launch Riot from there to access rooms in Matrix. Get started.
riot.im is the Riot host for existing matrix.org accounts, accessing the same Matrix rooms as riot.tzchat.org.
- Tezos Platform is the TG home to many Tezos OGs who like lots of the same gifs2 in their chat.
- Tezos Announcements is a curated announcement-only room of Tezos news.
#tezoschannel on freenode IRC (bridged to #tezos room on Matrix) was started by Tezos core devs back in the day and still has top tech minds lurking and helping out.
- Obsidian runs a Baking Slack. Important announcements to the baking community often happen there first. Bakers jointly resolve tech problems, including Ledger issues. If you bake Tezos you want to at least follow announcements there. Request an invitation at email@example.com.
The /r/tezos subreddit is active and has an associated subchat. Talk about prices in/r/tezostrader. Talk about baking services and delegation in /r/tezosdelegate.
If Tezos is being frequently discussed in Discord, those servers are not well known in the above chat worlds
The tezos.community forum, while not chat per se, has some conversations about Tezos.
Tezos Stack Exchange
While the above chat rooms can be a good source of interactive help, the Tezos StackExchange site has the answers to many questions about Tezos and is a good place to post new questions.