1. Buy drinks, it is a bar. If you want to make a spectacle of yourself to put on facebook, go somewhere else, preferably your parents' basement in Iowa or wherever it is you came from. Or at least buy everyone else a drink too.
2. Tip the bartender. Tip = 20%, because that is how bartenders survive. The cheapest beer I believe is $5. Do the math kids, that is $1 per beer. Every time. When you get a buy back, tip at least double. The bartender doesn't have to talk to you to do his/her job. If s/he does do you the honor, tip more.
3. Use the list to play pool. No one knows or cares whose quarters are on the table. No one knows or cares where you are when your name comes up, so be at the table.
4. Expect competition at pool. You don't get to ""just play your friend,"" you must play the person who last won, given they are still interested. It is the winner's choice to play doubles or not. And their prerogative to beat you badly. More detailed rules are on the wall, but it really doesn't matter, you are very likely going to lose.
5. The bathroom is for urinating, or perhaps defecating if you really must. Not drugs. Not sex. Not fun time with the plumbing. Not venting your frustrations, however warranted. If you feel like vomiting, go outside and stay there.
6. Use your iPhone for customized media content. You don't have any say about what is on tv, so don't even ask. The bartender is supplying you with free music, so tip more.
When everyone follows these simple rules, 119 is a fine example of a diverse and generally friendly dive bar. But do recall that you are not in Kansas (or was it Iowa?) anymore, and be glad.
Pros: cheap drinks, pool table, central location
Cons: ignorant clientele