Not sure if everyone read the idea on a waiting list with the calendar, so I’m reposting it.
To create a waiting list, duplicate your event to another calendar event during the same time, maybe taking place in a different room. Clearly title the calendar event a WAITING LIST, and document that inside the course details, so students are not confused.
You can then use this waiting list for determining demand or having a pool of qualified applicants ready to go if someone drops the class. I wouldn’t expect everyone to use this, maybe just committees who want to understand how many students they are not serving?
Here’s an example: