In the past two years, many former Twitter users have fled to Blue Sky, many to Mastodon, many to Threads. So far, I haven't heard of any genealogy chats on Threads, but the other three have chats on a regular basis. (I began on Twitter in January, 2009 and will always refer to the platform by that name.)
#GenChat takes place on the second and fourth Friday nights (US time) of every month on Twitter, then on those Saturday mornings on Mastodon--see schedule above. Led by Christine McCloud, the chat is an hour of sometimes guided conversation (meaning question/answer format) and sometimes free-wheeling open mic with a theme. To learn more, see the "how it works" section of the GenChat website here. No matter where you're based, no matter what your level of genealogy experience, you're invited to join this friendly chat. I'm usually on the Saturday Mastodon chats, with folks from all over the globe.
#AncestryHour, a UK-based genealogy chat attracting folks from all around, is currently in "show up and chat" mode, without any formal moderator. It takes place on Twitter on Tuesdays, at 2 pm US Eastern (7 pm UK). As the name suggests, it's an hour of informal conversation about whatever you happen to be researching or reading, and it can be a good place to ask for advice or just hang out.
Before Twitter was bought a couple of years ago, #AncestryHour had a team of terrific moderators...but then the new owner instituted changes that made formal moderation nearly impossible. Still, if you're on Twitter, please feel welcome to visit and chime in if you choose. I often join this chat on Tuesdays.
The newest chat is #GenHour, which will begin on the Blue Sky social media platform in September. The weekly schedule is shown above, with British Standard Time start times. So for September 5th, the 8 pm BST start would be 3 pm Eastern time for US participants. This new #GenHour chat is an effort to bring more interactivity to the growing genealogy community on BlueSky. I'm not yet on Blue Sky, so I won't be participating--but I'll be very interested to hear how this new chat develops!