High energy consumption buildings

I have extracted entries for buildings that use a huge amount of energy, over 2 million wH. I am looking at their entries in the meta file and I see that they all have a very large surface, most of them have low set temperature and neither of them operates on weekends.

I am really curious to find out what these buildings actually are. First, I thought they were shopping malls, but then, I came to the conclusion that shopping malls actually do operate on weekends.

They also might be factories, but Iā€™m not sure whether factories operate on weekends or not.

Do you have an idea what these buildings might be?