Prompt: Dancing
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Draco watched in border as his head of house aka Professor Snape demonstrated the Waltz with an older Slytherin 7th year girl. Most of the Slytherins Al dreads knew this shit, from having it drilled in their heads since they could walk. Most half-bloods knew how to Waltz, as it's just wizard tradition to Waltz at magical weddings.
But here he was snickering to Blaise and Theo on how ridiculous and redundant this all was. At least he had bagged some Beauxbaton for the Yule ball.
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This was me thinking about Snape teaching students how to dance. Made the wedding part up. Obviously.