Are special use facilities a waste?

This article in the Wall Street Journal is quite interesting, highlighting people now living in empty office buildings in London.  I have always looked at empty office buildings, and even empty strip malls, and wondered what it would be like to live in a place like that.

One thing that has always “bothered” me is the proliferation of “special use” facilities. Whether it is Churches that are only used on Sundays, or Football Stadiums that see huge crowds only 7 days a year. the amount of space and resources we consume for such limited use seems, well, wasteful.

What facilities do you think are under-used? How would you “re-use” facilities if you could?