I like a lot of the ideas here...
Evil Dead
Hitchhikers Guide
Time Bandits (or a Monty Python Theme)
Pink Floyd
Battlestar Galactica
Phantasm*
The Munsters
...I would add
Hellraiser
The Doors
Grease
Night Gallery
Invasion of the Body Snatchers
King Diamond Abigail theme
GWAR
a new Haunted House theme with LCD interaction
Cheech & Chong