Option for multiple bookings

Hi, my client is a co-working space and they offer 10 spaces (in the morning and afternoon slots each) in their Sprat Shed and Galley for individuals to come and book. We've set that up and that's running fine. However, my client wants to add an option whereby an individual can book 10 spaces at once - effectively booking the whole space for themselves. 

https://www.thespratshed.com/booking

At the moment, a user can only book one at a time which means if they want to book out the space, they'd have to repeat this process 10 times. 

Is anyone aware of avoiding this and allow a person to book a morning or afternoon slot in one go?

Thanks in advance. 

Jason