Blood Sucking Freaks

Blood Sucking Freaks is a 1976 American exploitation splatter film directed by Joel M. Reed and starring Seamus O'Brien, Luis De Jesus, Viju Krem, Niles McMaster, Dan Fauci, Alan Dellay, and Ernie Pysher. Set in New York City, the film follows a human trafficking ring masquerading as an experimental theater group, which stages Grand Guignol-style performances for audiences, who are unaware that actual murders and torture are being enacted onstage.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.