Katie carefully tied Quaffle's leash around a bar of a bike-rack outside. She didn't use any spells (it was a Muggle neighborhood after all), but the leash had a charm on it that prevented anyone from stealing the dog (or from him getting loose.) That done, she followed Devlin reluctantly into the shop.
At the question, she glanced up at the menu and shrugged. Sometimes she liked the more complicated stuff, but today she just felt like: "Just a medium coffee, cream and two sugars?" A beat later, she added, "Please. And thank you." Her mother hadn't raised her with no manners, after all.