I do not think ignorance is a defence in Miss Underwood's case. Surely any woman dressing in such a manner is doing so to inflame impure thoughts in men. She is not a child. I know modern society holds up the slattern as the ideal of virtue, but as she is not only conforming to this vile ideal but propagating it, she is perfectly aware, I am sure, of what she is doing.
Her own impure dress; and, from a quick look at the photographs, less than demure deportment, the loud, repetitive, rhythmic music and the dark close atmosphere make this a place inimical to virtue and repulsive to a Catholic conscience. You said there was a brawl? I'm hardly surprised.