Setting up a message on entry to the meeting

[PaulJessop]

Hi, I've seen various posts about messages in the waiting room and sending messages to invitees when a meeting is cancelled, but my need is as follows:

I run a ukulele club which uses Zoom for remote attendees. Occasionally, I need to inform members that the session isn't taking place on a particular week. The problem is that the Zoom meeting number is known by a lot of people, not all of whom I have contact details for.

Therefore, I need to set up a message informing people when they enter the meeting that the session is cancelled. I don't use a waiting room as I don't want to be constantly admitting people during playing songs, as not all are able to join the sessions right at the start.

Is there something like a pop-up screen that I can use to put a message on?

Thanks

Paul