I've been looking at this scene every night for the last 3 weeks. There are around 60 well-lit windows visible from my perspective.
That makes a total of almost 1,300 window views over that period and during all that time, I have not seen a single person or silhouette of a person in any of the rooms.
It doesn't appear that ANYTHING is being done in those rooms 24/7.
And it does still look like a massive waste of electricity.