U Square by A Train is a dimly lit bar on Guangfu South Road in Da'an District, Taipei, serving food and cocktails together. Its cocktails use tea bases and fruit combinations, and its main dishes include cheese crab innard baked eggs, stir-fried beef tongue udon, and hojicha duck breast risotto. The space has sofa seating, bar seating, and a private room, and cocktails can be ordered with sweetness, acidity, and alcohol strength adjusted to preference. Cocktail flavor varies depending on the menu item.