The event held at the Barnes and Noble Union Square was just massive! They had setup areas on all four floors and activities from 5 PM all the way to the launch of the book at midnight.
The first floor was for Wristband check-in. If you had reserved a copy of the book you were getting a gold wristband, if you hadn’t a red. That were the Eeylops Owl Emporium was as well.
On the second floor was Diagon Alley with the Magical Managerie, Weasley’s Wizard Wheezes, the Apothecary and Ollivanders.
The third floor was Hogwarts Castle where they had converted the cafe in Hogwarts Dining hall and the other side of the floor was the Forbidden Forest.
The fourth floor was for the activities.