You may want to block out a room e.g. if it is out of action. This is done in the same way as blocking time for a staff member but doing this in the calendar room view.
Select "Room view" from the drop down at the top right of the calendar.
Click the calendar at the time and room you wish to create the block.
Name your block.
Either drag your block end time or use the "Duration" drop down.
Select repeat if desired.
Select to block out the entire day if required.
Click "Save".