NIP-28. Amethyst had them built in and then there's also nostrchat.io and nostrchat.com and I believe Coracle used to have this built in, but no one used it so it was removed.
Discussion
nos-haiku is still the best 🇯🇵 https://nos-haiku.pages.dev/
Oh. I don't recall seeing this one. Thanks.
In Amethyst you have the "Chats" tab and the "Communities" tab.
0xChat does another type of public chat that Amethyst doesn't.
Oh shit finally found it!! Nice!
FOMO