As a person who worked in the industry for a decade, they clearly don’t care, or they would have said something. I’d only care if you were starting trouble and that is clearly not the case. Some bars will care about bringing in outside food or drinks, but that’s about it.
My honest advice: just order a water from the bar. In most bars (at least in America) the water is free and the bartender will just assume you’re the DD, and it might shut your clearly crazy/controlling friend there up.