Flock is a chat service where a channel already exists for everything online you want to talk about. No need to track down the right one- if it's a page, there's a flock for it.
Powered by Bluesky's ATProto ecosystem. there's no need to sign up for anything, bring your own account.
Just paste a URL into the sidebar or click the Flock browser extension from any page to start chatting about anything.