Due to the fact that we have a full day of birthday parties, we are unable to begin a party early or extend the time of the birthday party. We will try our best to utilize the time that we have within the party time, but we cannot offer a refund or partial refund if the full hour and half was not available due to tardiness of the guest. $150 will be added to your remaining balance if you are in the party room longer than your designated time.