I've always thought this about workplaces, they are basically redundant at night, most of them, and it wouldn't take too much effort to turn a few corners of most of them into liveable spaces!
Schools, for example. What a total waste of space for 12 hours a day!
This is so true! I was thinking the same about the very big churches in our country, they would be so good for accomodating people without a home after the sermon. Indeed the same is happening with a lot of big buildings which are left empty after the schedule is done. One would think that with so many buildings around no one would have an issue with finding accomodation somewhere