The Miss Universe 2019 Preliminary Competition and National Costume Show will be held at the Atlanta Marriott Marquis on December 6.
Now as per my research, the said property has three ballrooms: Atrium, Marquis and International. It would be logical to conclude that one of the three will be the specific venue for the two-in-one event.
Given a likely theatre arrangement, the Atrium Ballroom will seat more than the other two. So I’m guessing it will be held there specifically.
At least it won’t be the Mezzanine Level like that of Miss Universe 2017. But still, doing big Miss Universe pre-pageant events like these two in a hotel ballroom leaves much to be desired.