If you do not book all 8 available spots, the leftover spots remain open to the public and there is a chance that another group may book with you for the same experience. This situation typically results in a unique experience for everyone, providing the chance to meet, engage, and work with new and diverse people in ways you might not otherwise have the opportunity to do. We encourage the making of new friends and observe it happening often. There is no faster way to break the ice with strangers than to get locked up in a situation that requires everyone to work together to escape before your time is up.
Additionally, if you see less than 8 spots available for an experience, there is already another group booked for that time. Reserving for the same time will give you that opportunity to make new friends.