Hunks on Haunted Hill (2000)

Nine young hardbodies are trapped together for one night of terror in an old haunted house. But they're not alone...As the studly guests' strip and shower, an Evil Presence watches and steals their clothes! Awakened by screams and eerie noises, the guys' reality turns into a naked nightmare of stalking zombies, fight crazed monsters, graveyard ghouls, and ghosts in the attic. Thrill to the exciting naked action as these buffed-out boys collectively flex their bare muscular bodies to deter these devilish demons.