If you don’t see any available slots, try reducing the number of stations.
Multiplayer: To play 1 vs 1, you must rent two stations so you will have access to more than one racing sim. If you want to switch between players using only one racing sim for the time, you only need to rent one station.
Only 4 People Per Station. No exceptions. You will be required to purchase additional stations if there are more than 4 people per station.