Lounge music refers to music played in the lounges and bars of hotels and casinos, or at standalone piano bars. Generally, the performers include a singer and one or two other musicians. The performers play or cover songs composed by others, especially pop standards, many deriving from the days of Tin Pan Alley.
The term can also refer to laid-back electronic music, also named downtempo, because of the reputation of lounge music as low-key background music.