I want Belgium citizenship. A room will the clock start ticking?

I was told by one guy that I need a flat to get the clock ticking to get Belgium citizenship. Is there any truth to this?
If i get domicile anywhere in Belgium and the police come to make sure I live there doesnt that mean in 5 years I could be a citizen and the clock starts ticking when I register at city hall?
Or do I have to rent a flat to get the clock ticking?
I know some rooms people dont let you get domicile, Im talking about the rooms with roomates that DO let you get domicile. If i got domicile with a roomate would that also count towards my path and time towards citizenship which would be 5 years?
Im american by the way.

http://lmgtfy.com/?q=Belgian+nationality

What matters is domicile. If you are domiciled in the address you live and make sure you update the address in town hall whenever you move, that is enough.