Final answer:
Urban popular music in the 1930s grew out of music halls, burlesque theaters, and ragtime from dance halls, blending African American musical influence with white middle-class interest.
Step-by-step explanation:
The three colonial institutions out of which urban popular music grew during the 1930s for the middle class were music halls, burlesque theaters, and ragtime in dance halls. Music halls and burlesque theaters provided a space for entertainment that catered to popular tastes with performances that included singing and dancing. The genre of ragtime, which blended black spirituals with Euro-American folk music, emerged from dance halls and red-light districts, leading to early jazz culture. This African American musical influence grew in tandem with the white middle-class interest in such music, creating a cross-cultural exchange that helped popularize jazz music, rooted in the experience of the working class and the Southern creole culture.