just a Space divider and ghost chairs. Another one where they put the long table up against the wall. Instead of chairs, have wall-hugging storage benches in an L-shape, with chairs on the 'living room' side and on the end for a big party.
It can be carried out in several methods and number of room dividers may be used. Plants, shelves or railings could also be utilised as dividers. Multifunctional dividers are excellent for saving space.