At the moment, if you want to block a space as OOO the space has to be empty. This is really frustrating if you have a big space, eg our 28 bed dorm. I need to unallocate/upgrade all bookings first. It would be easier if I could mark the space as OOO first, then any reservations that can fit into other spaces of this type would be automatically moved. Everything else would sit unallocated for me to upgrade when I'm ready.