What does it mean??

x2 what they said

A little bit more about the $30: In those days, there was a pretty wide margin for where a bad girl could be, between being an out and out prostitute, and being a "bad" girl who went around with men who would give them "money to tip the bathroom attendant" (even when the places gone to would, of course, have no bathroom attendant, and even if they did, a bit of change would have been an actual tip). A man out with a gal like that would give her, say a $1, or $5, or a $20 if he was really trying to impress her, which was more like $100 today, so those girls would go out with men, to bars, and have drinks, and face all kinds of risks, to get enough money to live on, week to week. To live like that a girl would have to be pretty quick, and tough, to avoid the inherent dangers, and would most likely have come from an abusive home (sexually, physically, or both). The cleverest ones could avoid needing to become out and out prostitutes.

In those days, a girl who "worked" like that was pretty much seen as just as bad as if she were a prostitute, even though the girl might not actually have sex with the men, at least, not as often as a prude would think they would.

$30 would buy her a whole lot of meals during a dry spell, if she were stuck and not able to find men who were safe enough to pursue for "tips".