Car dies & they walk for help. Find big victorian? House, ask for phone & enter. Strangeness ensuses they can't leave. Meanwhile outside there are strange scenes in a junk/graveyard with deformed/degenerate humans. House has organ, lots of books, a master/judge. An attic scene then a slide down a chute. Somehow they leave an walk out to a railroad track. One of the players may have been on Saturday Night Live.

Nothing But Trouble (1991) (http://www.imdb.com/title/tt0102558/)
This one I know for sure is it...

I think the move is "Nothing But Trouble" with Chevy Chase Dan Aykrod and Demi Moore.

Nothing But Trouble (1991) (http://www.imdb.com/title/tt0102558/)

I won.. by seconds!! Lol ;)

I know I was so proud that I actually knew a movie and you beat me to it!!