The Kids Aren't Alright

What if after the Battle of Hogwarts, the war ends and portions of the students chose to live in the muggle world. Minimal magic, only using it for the necessities.
Hermione works her way up as a no-nonsense manager in a nightclub, using magic to create a business venture that is so successful for its live music and beautiful atmosphere. The secret of her own? She spends her off time writing music and performing in an underground band with Luna and Ginny.
Harry chooses to stay in the magical world but still keeps in touch with Hermione and Ron. He mainly focuses on him and Ginny's three children in their preparations for attending Hogwarts at eleven.
Ginny has yet to tell her husband of her underground music life
Ron was greatly affected by the loss of Fred and chose to travel indefinitely to 'find himself.'
Draco Malfoy, Theo Nott, and Blaise Zabini formed a band for fun after being under house arrest following the Battle of Hogwarts. With the use of some magic, Pansy and Astoria in charge of wardrobe, and Daphne as their manager, they have accidentally found major success in the Muggle rock scene.