From the Calendar you can manually disable the reservation of classes. This will prevent booking both via reception and E-Commerce. Please note that only by users with the appropriate rights can disable class booking.
Open the Calendar and select the slot of the class for which booking will be disabled.
Once you have clicked on the arrow near "Save Changes" a new button will appear. Click on Block Bookings.
The class will be marked with a red symbol, that notifies about bookings being disabled.
To re-enable bookings, you will have to repeat the same procedure.
Please note that in each window where bookings are performed, the user will be informed about the unavailability of bookings for that specific class e.g. Home Page - Timeline. In the E-Commerce, the class will just not appear among those available for booking.
Please click here to see how to block/unblock reservations for multiple classes