Yes. You can block off scheduled events on your calendars as “non billable”. As Kitchen Administrator, you are able to create events on your own calendars.
Simply go to the Scheduling Tab and click the Space Calendar that you wish to add the event.
Create a new event by dragging and dropping on the day/time frame you need. When the event window pops up, fill out the form, and Override the Hourly Rate with “$0”. When asked “which client is making the booking?”, select N/A (non billable). You can also set this up as a recurring event.