I don't think hackerspaces would be considered a real business. Most of them are non-profit and community driven. If you live somewhere with enough hackers, it makes sense to have something like this. My grandmother has a "hackerspace" for their gang of mahjongg players. All the gamers put in money to rent out a huge office where they can play 24/7.

More info here: http://hackerspaces.org/wiki/Hackerspaces