William Butler Reynolds, a 20-year-old San Franciscan with a penchant for dancing and song-writing, is about to inherit a sizable fortune. His guardian uncle decides to send him to New York to be educated in the “ways of the world” by three lady friends–Jacqueline, Maxine, and Pauline, Follies girls, who agree not to vamp him though he falls for Jacqueline and is jealous of her admirer, Phil Kempton. Bill’s inept attempt to promote a song with a producer results in the firing of all three girls; and when Jacqueline then resists his advances, he picks up Alma, a telephone operator, and becomes attentive to Cleo, a Follies vamp, but the girls save him from her wiles. Luckily, the producer accepts the song and rehires the girls; Jacqueline, realizing the sincerity of the boy’s love for her, embarks for Europe with Phil; but Phil realizes the appropriateness of the match and sees to it that the lovers are united. More on Wikipedia or Mubi
Watch Safety in Numbers (1930)