An agenda can be used for persons, to make appointments, reservations etc.  An agenda can also be used for resources, such as a tennis court, football court. Even if you have multiple courts, you can have an agenda for each one of them.

The reservations made, can be visualised on a special designed website. This way, you can give you internet public easy insight in when your resources are available. You can even have the possibility to make reservations online. In that case, clients need to register, and login with a password, to be able to make reservations.