The architecture of the place is a little suspect—Wright, notwithstanding—secret rooms, disappearing doors, and a basement with an amenity no house should be without, a basement with a pit-bath of hydrochloric acid...handy if there's no recycling service.
And just to spice things up a bit (because God knows a haunted house isn't enough), each participant is given a loaded pistol, decoratively placed in a small complimentary coffin. What good firearms would do against restless spirits, already dead, is a question, but the answer would lead one to suspect that ghosts may not be the main problem at the address. But, that's never brought up. Pretty soon, people start disappearing, getting conked, grabbed, and (when all else fails) killed. Through it all, Loren just smiles and cracks wise in sepulchral tones. It's his party, you can die if you want to.
Director Castle—the P.T. Barnum of the movies—enhanced this with a gimmick he called "Emergo"—a glowing skeleton would emerge from a casket stage-left and fly over the audience (not exactly "smell-o-vision" but it would do). Just one more feint in a movie full of them, both momentary and unexplained, as castle was the master of the cheap trick.
*—although that entire phrase ('interesting reality show") is complexedly oxymoronic)