Yeah, some sort of a meeting room (but how do you access it (other than the loading dock hall)?)
I'm surprised there is no stair next to that escalator (as shown in the plan below).
Could be to prevent shoplifters escaping downstairs or just to prevent shortcutters to the mall.
The ground floor plan also tells us where the Tenant 1 demising walls will be,
inserted in blue. Bigger ground floor than Aritzia!
Tenant 1 has an elevator at the back corner (shown on Aritizia plans)
but needs escalators.
I still think that Tenant 3 (Simons?) should have an entrance from Howe St.
PS - there's active construction building the Tenant 3 No. 731 entrance corridor.