I know that times are tough, but it is never okay or acceptable for a person to bring their own bottle of booze inside a club, bar or restaurant (unless you bring in an unopened bottle of wine, then you pay a corkage fee). Bringing in a flask filled with "name your favorite spirit here" is a major faux pas. Its trashy and its illegal. ABC could swipe a business's liquor license away if they caught outside booze being brought in and consumed on the premises. No liquor license means no liquor sales which ultimately result in loss of business and loss of jobs for the business's staff.
Tonight while cleaning up, I stumbled upon an empty bottle of tequila that was brought in and drunk by one of the night's customers then discarded underneath a table. I mean if you truly can't afford to go out and have to stoop to the ultimate low of bringing your own booze to a bar, you should really reconsider going out in the first place.
Now it just makes me wonder about all of those people who only ask for non-alcoholic mixes like soda and juice. Are they really not drinking or are they smuggling in their own liquor?