The Mad Love Life of a Hot Vampire (1971)

Count Dracula (Jim Parker) sends three of his vampire women into the Las Vegas night to have sex with men and collect their "vile red blood". Meanwhile, Dr. Van Helsing helps his friend Bill find the cause of his sister's mysterious death, in which her blood had been drained. In the process, he and Bill discover Dracula's hide-out and chase him into the deadly rays of the sun.