That’s how I got my first job haha, go in and say are you hiring barbacks, I want to work here. Say you like to work hard and eventually want to bartend but are willing to put in the hours, if you were an athlete at one point mention it... if you actually bust your ass barbacking you’ll be bartending in no time. What makes people barback for over a year is usually because they don’t care/disappear for hour spouts during the night. I barbacked for 6 mths at a busy pub, was told to find my own replacement and I can bartend. Now I’m barbacking at a very high end cocktail bar/restaurant that turns into a nightclub at night. But after a month of busting my ass I’m serving and working POS for drinks and food while it’s not busy. Just be known to be the guy with a good attitude, always willing to learn, and willing to pick up the slack of barbacks who don’t care without complaining about them. The bartenders and managers know who’s slacking and who’s working hard. I was offered a management position at 20 years old at my first place I turned down because of school. Seriously just be that guy who can’t be bored, bc as a barback there is literally always something to do, whether it’s cutting garnishes, checking bottles to see which are low and will need to be replaced soon, cleaning and organizing every surface of the bar to the bartenders preference, breaking down boxes out back. It’s an endless job but a lot of people slack, but I realized that 12-14 hour shifts go by way quicker if you’re always doing something productive.