No. LaVeyan Satanism is atheistic; they do not believe in Satan, or demons, as literal beings, but rather as allegories for the amoral dictates of nature.
LaVeyan Satanism focuses on the human element, and borrows from the philosophies of both Alistaire Crowley and Ayn Rand. It is firmly grounded in reality. All the pomp and circumstance related to things like 'Black Mass' and LaVey's position as 'The Black Pope' was a product of LaVey's showmanship, a quality he employed as a carnival worker before his religion became the focus of his life.