Replace everything in [brackets]. Keep the date, the time with its time zone, and the place in the first lines: that is what people look for.
On the common-lisp.net calendar
Post at https://common-lisp.net/meetings/. The form asks for each part on its own; the description can be as short as this:
[Speaker] shows [what], then lightning talks and time to hack. Bring a laptop if you have one; newcomers welcome, we will help you get a Lisp running. [Food and drinks provided by our host, Example Ltd.]
A meeting that repeats is posted once, with how it repeats.
A mailing list, a forum, a group chat
Subject: [Group name]: [talk title], [Tuesday 12 November], [18:30 CET]
Hello all,
The next [group name] meeting is on [Tuesday 12 November] at [18:30 CET], at [place, address] [and online at https://meet.common-lisp.net/your-room].
[Speaker] will talk about [talk title]: [two sentences on what it is about and who will enjoy it].
After the talk: lightning talks (five minutes on anything Lisp, sign up on the night) and time to hack and talk. Newcomers are very welcome; if you have never written Lisp, bring a laptop and we will get you started.
[How to get in: the door, the floor, who to call if it is locked.]
On the calendar: https://common-lisp.net/meetings/
See you there, [your name]
A short post (Mastodon, Bluesky, Reddit, LinkedIn)
Common Lisp in [city], [Tue 12 Nov], [18:30 CET]: [speaker] on [talk title], then lightning talks and hacking. Newcomers welcome. [link] #CommonLisp #Lisp
For r/Common_Lisp and r/lisp, a title like "[City] Common Lisp meetup, 12 November: [talk title]" and the mailing-list text as the body.
The reminder (a day or two before)
Reminder: [group name] is on [Tuesday] at [18:30 CET], [place][/ online]. [Speaker] on [talk title]. [Anything new: a change of room, a second talk, pizza.] Details: [link]
On the day, online
We are starting in 15 minutes: [room address]. Microphones off as you come in, please; say hello in the chat.
The recap (within a few days)
Subject: [Group name], [12 November]: [talk title], and the next meeting
Thank you to everyone who came on [Tuesday]: [number] people in the room [and number online], [number] of them for the first time.
- [Speaker], [talk title]: [one or two sentences]. Slides: [link]. Code: [link]. [Recording: link.]
- Lightning talks: [name] on subject; [name] on subject.
- [Anything else worth noting: a library someone started, a question nobody could answer.]
Thanks to [host] for the room [and the food].
Next meeting: [date, time, place]. [Talk, if known; or: we are looking for a speaker, reply if you would like to talk.]
Asking for a speaker
We are looking for a speaker for [date]. Twenty minutes on anything you have done with Lisp: a library, a project at work, a bug that took a week, a book you liked. It does not need to be polished, and first-time speakers are very welcome: we are a friendly room. Reply to me or talk to me at the next meeting.