Sofas are a type of furniture that typically consists of a long, upholstered seat with armrests and a backrest. They are often found in living rooms and other areas of the home where people gather to relax and socialize. The term 'sofas' can refer to three different types of furniture: lounges, COUCHES, and SETTEES. Lounges are large sofas with two or more cushions and a low back. COUCHES are smaller than lounges and usually have one cushion and a higher back. SETTEES are similar to COUCHES but are usually shorter and have no arms.