Listen to Sweet Waltz Lounge online. Sweet Waltz Lounge is an Unknown language song and is sung by Instrumental Jazz School. Sweet Waltz Lounge, from the album Swing Jazz Coffee Party (Mellow Carnival, Moody Rhythm, Blue Vibes, Shades of Smooth Retro), was released in the year 2018. The duration of the song is 3:49. Download Unknown songs online from JioSaavn.