Hi Magesh. It depends what kind of impression you want to convey, and the kind of customer you wish to attract. Some showrooms place the furniture in groupings to show a collection and suggest combinations, complete with lamps and a painting or clock on the wall. The customer would then pass through several of these on their way though the store. This might appeal to a high-end customer.

Another approach might be to break up the sets and group everything by type. Rows of sofas, rows of tables, rows of bookcases. This would appeal to the bargain hunters and give the impression of abundance.