Many room layouts require the same items (tables, couches, bars, etc) to be used more than one time in a single layout. Some items, like tables and chair rows can be added in bulk while others can be quickly duplicated using a keyboard shortcut or with the click of a button.
To Duplicate a Floorplan Element:

NOTE: The duplicated elements will contain the same information as the original, including name, color, dimensions and rotation. You can change these by selecting the element(s) and using the dynamic menu that appears at the top of the canvas to make changes.