On the booking screen, guests should be able to see a message EG. ONLY 2 Rooms left.

Also have the ability to select No. of Rooms.
Currently guests who want to make a group booking ring us as they can't see if there is availability to book more than one room. They currently add one to cart then get message of no more rooms when trying to add another room to the cart. They have to keep guessing availability until they can get two or more rooms booked for the same time period. Very frustrating for guest experience.