Question

Many young black ambitious musicians migrated to Harlem around 1940, where they found an alternative music scene in the after-hours _________ that allowed them to play what they wanted to play, experiment with new harmonic concepts, and work on extending the technical mastery of their instruments.

Answer 1

Jam sessions

Explanation:

Many young black ambitious musicians migrated to Harlem around 1940, where they found an alternative music scene in the after-hours Jam sessions that allowed them to play what they wanted to play, experiment with new harmonic concepts, and work on extending the technical mastery of their instruments.

The key word after-hours for music scene and the phrases following the blank indicated that these are Jam Sessions where musicians can improve their skills with the freedom of playing whatever they want.