The Death Factory Bloodletting (2008)

"Death Factory: Bloodletting" ('Saw' meets 'Hostel') is a horror film about a group of online deviants who are invited to an abandoned factory to witness a "bloodletting", an event displaying the torture and murder of an innocent person. Once inside, they soon realize that they have been lured into a trap by a self-righteous madman who uses the factory and its bloodthirsty inhabitant as his own personal version of Hell.