Five Dolls for an August Moon

5.8
Overview
A wealthy playboy gathers a group of bourgeois friends at his isolated beach house for a weekend of relaxation. When bodies start pilling up, they realize they’re trapped with a killer in their midst, sending them in a frenzy to figure out who amongst them is killing the others before they are killed next.
Recommendation & Similar
The 7th Voyage of Sinbad (1958)
Kill, Baby... Kill! (1966)
The Phantom of the Opera (1925)
Trauma (1993)
Hercules in the Haunted World (1961)
Danger: Diabolik (1968)
Dr. Goldfoot and the Girl Bombs (1966)
Cruel Jaws (1995)
Night of the Bloody Apes (1969)
The Thief of Bagdad (1924)
Footprints on the Moon (1975)
The Unnaturals (1969)
Phantom of Death (1988)
Four Flies on Grey Velvet (1971)
Juliet, Naked (2018)
Band of Outsiders (1964)
Basic Instinct 2 (2006)
After Hours (1985)
Anchorman 2: The Legend Continues (2013)
Jungle (2017)