Sleep Chamber is an American industrial band fronted by John Zewizz. The band is known for using S&M, bondage and magic imagery on their artwork, during their performances, and within their lyrics. Formed in 1981 by high school friends Zewizz, Eugene Difrancisco, and Phil Brosseau, over the years the Sleep Chamber lineup has changed many times with Zewizz being the sole permanent member.