The juke joint, the honky tonk, and the ballroom also represent one more thing, anthropologically speaking: a ceremonial context for the male-with-female-duet dance flirtation and embrace, upon which the zoological survival of the human species has always been predicated.
Effective stream-of-consciousness narration is the product of verbal precision, not just of literal documentation. It is decidedly not a matter of unedited free-association.
Jazz music, as is also the case with the old down-home spirituals, gospel and jubilee songs, jumps, shouts and moans, is essentially an American vernacular or idiomatic modification of musical conventions imported from Europe, beginning back during the time of the early settlers of the original colonies.
The blues is not the creation of a crushed-spirited people. It is the product of a forward-looking, upward-striving people.
The improvisational nature of jazz musicianship is such that a truly competent performer must be prepared to function as an on-the-spot composer who is expected to contribute to the orchestration in progress, not simply to execute the score as it is written and rehearsed.