This actually looks fairly terrifying, so if you're in the L.A. area, I'd urge you to check it out! The event will be held every Thursday, Friday, Saturday and Sunday from October 10 to November 2 and  feature 15 nights of music, culminating with a November 2 headlining performance by Rob Zombie himself. Check out the really interesting line-up over the course of the 15 nights:
"In addition toRob Zombie, Great American Nightmare music performances will include: 3OH!3, 45 Grave, Andrew W.K., Beware Of Darkness, Blaze Ya Dead Homie, Blood On The Dance Floor, Butcher Babies, DirtyLoud, Dirtyphonics, DJ Bl3nd, Doctor P, Duane Peters, Eagles Of Death Metal, Emilie Autumn, Evol Intent, Fei-Fei, Ghost Town, Goldfinger, HeavyGrinder, Kottonmouth Kings, Metalachi, Mod Sun, One More Time (Daft Punk Tribute), Ozomatli, Powerman 5000, Reel Big Fish, TSOL, Terravita, The Dickies, The Used, The Vandals, Twiztid, Vampires Everywhere, Wallpaper, William Control, Winds Of Plague, and Zomboy. One night will also feature pro-wrestling sensations Lucha Libre USA."
More info can be found here.
