A lounge with an area for work
Sometimes it is normal that we need to include in an area home to work on an occasional basis, not necessarily have to be an independent, is simply to enable a space can be perfectly integrated in another set of stay, provided they know to condition ACCORDINGLY.
The lounge usually stay in the house that shares more features, too often the room is bigger and that makes it especially suitable for multi-functionality, so we can reserve a corner of our living room to install it in a desk chair with a corresponding and other elements necessary to our work space.

How to define this area and the separemos across the living room, will largely depend on the privacy they need to work, you can opt for a simple visual separator, only narrow the location, but without creating a barrier or either by a screen or a panel that if you isolate the work area from the rest.
If we need only identify the area in sight, so that we can see the distinction between different areas in the same space, can serve several resources on one hand the change in color or materials of the furniture used in different areas or the use of different carpets by the use of other furniture to make separators such as the shelves.
Proposal of the image is Doimo Passport, is a case in which the work area is separated from the area to be alone with a few simple puffs that make the role of visual delimiters, a decorative both use the same areas furniture style and color so they are perfectly integrated.