How does Ann Petry use imagery in The Street?

Imagery:

"The inside of the Junto was always crowded, too, because the white bartenders in their immaculate coats greet customers graciously. Their courteous friendliness was a heart-warming thing that helped rebuild egos battered and bruised during the course of the day's work."

"You done lived in basements so long you ain't human no more. You got mould growin' on you."