Julie Newmar's Queen Bee character was based on a prostitute with the same name. Moreover, the actual Queen Bee appears briefly in the film in a very small part.
Shot entirely at night over the course of 24 days at existing practical locations
The opening shot of Cookie arriving in New York City via bus was filmed on the last day of shooting.
The character of Jason is based on an actual Boston (MA) pimp named Socks.
Director/co-writer Joan Freeman and producer/co-writer Robert Alden did research with vice detectives in four major American cities.