Final answer:
Zora Neale Hurston contrasts her own intense reaction to jazz music with her white friend's unmoved response; he stays motionless and remarks that the music was simply 'good'.
Step-by-step explanation:
The evidence Zora Neale Hurston gives to support her claim that her white friend was not as affected by the music at the jazz club is multi-faceted.
She describes her own deeply visceral and transformative reaction to the jazz music, contrasting it with her friend's detached and mild response.
Specifically, she notes that he remains motionless during the performance and afterward, only comments that the music is "good" while calmly drumming his fingertips on the table, completely unaffected on a deeper emotional level by the robust and passionate jazz that profoundly moved her.