Final answer:
The most popular musical style among middle-class Zimbabweans isn't specified in the provided references, but cultural exchanges through trade likely influenced their musical preferences.
Step-by-step explanation:
The question regarding the most popular musical style among middle-class Zimbabweans does not have a straightforward answer detailed in the provided reference material. However, we can infer from the historical context that the musical preferences of middle-class Zimbabweans might have been influenced by global trends and interactions through trade. The rise of the middle class in various societies often brought changes in cultural consumption, including music. While the provided references touch on various musical styles, including jazz, blues, and traditional African music, they do not specify the preferences of Zimbabwe's middle class. Given Zimbabwe's history and significant trade dealings, which included cultural exchanges, it is possible that the middle class in Zimbabwe was exposed to a wide range of musical styles.