The Killer Reserved Nine Seats (1974)

A very rich Englishman of ancient nobility, Patrick Davenant, on the evening of his birthday, invites some friends to visit the old theater located in the family palace and which has been closed for a hundred years, since a family had remained there closed and had entirely perished there. The protagonists of the tragic night are: Rebecca, Patrick's sister, with Doris her close friend. Lynn daughter of the same with boyfriend Duncan. Viviana first wife of Patrick, with the current husband Dr. Dalbert; Kim starlets engaged to the landlord, with her lover Russel. As soon as the party, to which a mysterious character has to be added, accompanied by a guru, enters the room, all the doors close; then begins a chain of crimes and horrors that Patrick almost ritually commits, according to a centuries-old curse.