Nobody should ever hear your phone
You should treat your phone like wealthy parents treated their children in the 19th century: They should be seen, not heard. Actually, you know what? They shouldn't be seen either. You are at a bar. Talk to people. Put the phone down! Well, unless you need to check your email, Instagram, Bumble, fantasy football, Slack, stocks, horoscope, texts, or Twitter... obviously. Man, smart phones are incredible, right? Just keep it on silent. And no taking phone calls. Step outside. Even if it's your mom. All that bar noise will worry her anyway.
When playing the jukebox, play to the crowd
Music, like candy corn, is inherently subjective. No one is going to have the same opinion. Of course, when you put down money to play a song on the jukebox, you want to play something you like -- it is your money, after all. But you probably shouldn't play "Sunshine, Lollipops and Rainbows" at a biker bar. Nor should you put on 41 minutes of DOOM at a bougie cocktail joint with Edison bulbs and bartenders wearing non-functional suspenders. Read the room. Play to the crowd. And when in doubt, play some early '70s Stones.
Don't complain to the bartender about drink prices
No, a mimosa should not cost $25, even with a lovely coastal view or complimentary cashews. However, you should know that it's never the bartenders who set the prices. Yelling at them is like screaming at a bull because the rodeo you're at sucks. They would probably change it if they could, but they can't. Instead, either write a strongly worded letter to the owner or shut up and enjoy your overpriced drink and the view.