You will need to reach out to our support team and ask us to turn this on for you.
Do not use this feature if you are requiring upfront court fees for reservations.
Go to Settings - Reservations Settings - Reservation Types
You must have MINIMUM number of players set on your Reservation Types in order for this to work. This can include guests.
On the Player side once your player selects the reservation type
They can then immediately move and Click the Blue Save & Add Players button at the bottom of the screen.
Your player then will have 5 minutes to add the additional players to the reservation and save.