Interesting. That hotel began life with the intention of it being a Garden Inn, then it was going to be a fives hotel.
SKS were the devolopers of the two DoubleTrees in Perth.
They do have the data. They know which planes are coming, when they are coming, and how many people of status etc are on that flight. They manage accordingly.
You're not the first to discover this :)
https://www.australianfrequentflyer.com.au/community/threads/radisson-flagstaff-gardens-is-now-an-evt-hotel.122044/