Complex sentence: That night, Andy, Chris, and Brad attend a night club called "Club de la Lune" where the owner, Claude, is actually the leader of a werewolf society that uses the club as a way to lure people in to be killed.
Split into simpler sentences: That night, Andy, Chris, and Brad attend a night club called "Club de la Lune". The club's owner, Claude, is actually the leader of a werewolf society that uses the club as a way to lure people in to be killed.