Let members know they're booked.
Some groups such as Ukulele groups, Bell Ringers, Jazz Bands, etc have more members than they need for a particular performance. With this option enabled, you can book members for each event.
With this option enabled, a Booked column will now appear in your Event Summary showing the number of people booked.
A button is also above the member responses in the event details to book members and a Booked column appears showing which member has been booked.