You can close reservations for classes before classes start. This is helpful if you have a lot of class setup to take care of, or a long drive to class and don't want any 'last minute' reservations coming in.
Click on Manage Account, then Reservation/Schedule Settings.
On the left side change the # of hours before a class that reservations should be closed. This applies to ALL classes that accept reservations. The default is zero hours.
Don't forget to click 'Save Reservation Changes' at the bottom!
Now if customers click on a class on the schedule and (to use the example above) it's less than 2 hours before the class starts, they will see a message telling them reservations need to be made at least 2 hours before class starts.