I’m not saying this as a bad move but as someone who has experience owning venues which serve alcohol, the moment you tell people they can’t get a straight shot or a double shot or you cut them off because they’re getting too drunk/rowdy… customers get very angry very quick. It’s very hard to balance a family friendly and classy environment and providing liquor, even with menus. It’s unfortunate but that’s the reality.
They're serving beer and wine now. Anyone getting upset because they can't get a vodka soda currently is still going to get upset when they can't get a vodka soda, even with a couple pre-made drinks added to the menu.