Click on "Settings"
Click on "Accomodations"
Click on "Types"
Fill up the blanks with the necessary information
Click on "Add" in order to create this new category
You just created a new room type!
Click then on Rooms
Select the category you've just created
Click on "Number/Name" field
Type the name of your new room and Click on "Add"
That's it!You just created a new room in a new category