How to limit the number of attendees for a free event
When you promote a meetup or a small gathering, it makes sense to limit the number of attendees. With paid events, you can do it when configuring ticket types. For free events, the process is similar.
Set your event as Free on the Add Event form. You can do it in the Tickets section
You will see the Number of Tickets option. Set it to Limited by and enter the number.
Don’t forget to save the event by clicking the Save button.