In House on Haunted Hill (1959), Vincent Price and Carole Ohmart "get the guests" a good three years before Edward Albee's Who's Afraid of Virginia Woolf?
The Tingler (1959) features Price again, this time co-starring cute-as-a-button Darryl Hickman and a trilobitish creature that lives on the spine.
As for Strait-Jacket (1964), five words: Joan Crawford. With an ax.
Had I only planned ahead, I would be watching a William Castle triple feature tonight. The idea's been gestating in my head for a few days now. Castle's films played a pivotal role in my childhood love of horror. Castle (1914-1977) was the king of gimmicky horror films in the late 1950s and early 1960s. These three were both directed and produced by the poor man's Hitchcock. He produced one of my all-time favorite prestige horror films, Rosemary's Baby, directed by Roman Polanski, in which he also appeared in a cameo role--as he did also in another of my favorites, non-horror, Hal Ashby's 1975 Shampoo.