In order to restrict access to the classes of directed activities, we will go to:
System → Group classes → Groups of Activities
Where the following window will open:
From here we can restrict access to the classes of activities directed from the option "Accessible to all customers".
As we can see there are other options such as "Allow Cancel Online Reservation" or "You can book by web or APP", where you only have to click on the box to activate or deactivate them.
We can also put a maximum number of reservations per day or per week.