Series, or "serials", of various genres were particularly popular during the first decade of sound film. At just one major studio, Fox, B series produced by Sol Wurtzel included "Charlie Chan, Mr. Moto, Sherlock Holmes, Michael Shayne, the Cisco Kid, George O'Brien westerns his move to RKO, the Gambini sports films, the Roving Reporters, the Camera Daredevils, the Big Town Girls, the hotel for women, the Jones Family, the Jane Withers children's films, Jeeves, the Ritz Brothers." These feature-length series films are not to be confused with the short, cliffhanger-structured serials that sometimes appeared on the same program. As with serials, however, many series were specifically intended to interest young people—some of the theaters that twin-billed part-time might run a "balanced" or entirely youth-oriented double feature as a matinee and then a single film for a more mature audience at night. In the words of a contemporary Gallup industry report, afternoon moviegoers, "composed largely of housewives and children, want quantity for their money while the evening crowds want 'something good and not too much of it.'"