"De Rookerij" means 'smoking room' in Dutch.
It is also a very fine coffeeshop in the 'establishment for the licensed sale of cannabis' sense of the word, in Amsterdam.
This thread started here http://www.jehovahs-witness.com/12/82082/1350843/post.ashx#1350843
The idea is if you are stoned and want a natter, come on in. Obviously we can't stop you straight people coming in, and you're welcome too, just don't complain about the smoke, okay?