The seven deadly sins and the characters who commit them
Pride - Alvin, the Seminarian.
Envy - Corinne (the hot brunette), the “collector of men.”
Gluttony - Mr. Ducha, the Tour Driver.
Lust - Howard Foster, Corinne's last addition to her collection.
Wrath - Mr. Mason, the curmudgeonly complainer.
Greed - Nancy Foster, the gold-seeking angry wife.
Sloth - Regine, the (hot) sleepy blonde.
Some, of course, are guilty of more than one main sin, such as:
Nancy Foster, the angry wife: jealousy (although her husband gives her good reason to be jealous), envy (of the beauty of the other women) and wrath (I don't think she smiles once, except when she's literally swimming in gold).
Corinne: lust (lesbianism & adultery).
The original title translated to English is "The Long Night of the Devil" or "The Devil's Longest Night." I feel "The Devil's Nightmare" is weak and much prefer another alternative title used for the VHS and one DVD version: "The Devil Walks at Midnight."