From the 2nd Floor Ballroom

 The 2nd floor ballroom is the bottom of the higher atrium. 

In the image Ann is seen with the smaller atrium in the near background and the Wilson Bridge in the far background.

On the 1st floor (the bottom of the smaller atrium) there are restaurants (including the sports bar) and shops.

Between the 1st and second floor is a mezzanine level with the Registration area and some banquet areas.