Hot Child in The City (1979)

Hot Child in The City (1979). US produced vintage color sex adult feature film, featuring Brenda Lockwoodm John Holmes, Bobby Astyr, Herschel Savage.
IMDB

Two great looking girls arrive in the city seeking employment in the film industry. During their lengthy interview, they watch many other people making love behind a series of doors. When they are offered the job they can’t wait to join in on the hot sex action!