Racquetball is a racquet sport played with a hollow rubber ball in an indoor or outdoor court.
Here is a short video explaining the rules
Court Bookings - Courts are booked in the same as if booking to play squash. A booking sticker is purchased from the machine (peak times) and placed on the booking sheets which are posted on the notice board every Saturday/Wednesday.
As with squash, It is recommended that players try to sell on courts if unable to use it. A league is also in operation.
For the full rules follow the link