The correct answer to this open question is the following.
Although there are no options for this question, we can comment on the following.
Indeed, despite societal mores that demanded separation of the races, "white slumming" (whites intermingling with blacks in black nightclubs) was common during the Jazz Age.
This cross-class socializing did not transfer to broader society because white people only intermingled with African Americans in those moments, enjoying the musical talent of black people. And that's it. Whites were never interested in strengthening their relationships with blacks. Jus saw black people as an artist, to have a good time and have fun in the clubs, with no intention to initiate a friendship.
For whites, was as simple as "I pay for the show, have a good time, establish the necessary contact to interact, and that's it." Segregation still existed under the Jim Crow laws and the black codes.
The Jazz Age occurred during the decade of the 1920s. It was a movement in the United States after World War I. From that movement, a new musical genre called Jazz emerged. African Americans created this new style of music that used the radio to spread the music to all kinds of audiences during the 1920s. Among the famous Jazz musicians of the Jazz Age, we find Cab Calloway and Duke Ellington.