Eventually, Granger led them away from her parents and siblings and the other adults, back to the foyer and up the marble stairs.  This was where the music came from, currently something with deep bass and instruments Draco didn’t recognize.  Lavender and the female Weasley cheered, running into the fray to begin dancing.  Potter and Weasley reluctantly followed.  Granger took the rest of them to a bar, giving them the unfortunate news that the drinking age in the U.S. was twenty-one, and as such they’d have to stick to more sparkling juice.