During the week, they play 5-10NL and 10-20NL.
On saturdays a table with 1-2 is opened.
They start playing at 20.00h. Registration starts at 18.00h.
I tried to play 2 times on thursday, never got the chance to because of a long waiting.
If you are in Brussels, maybe it's worth to play in "namur". They offer more poker games. +- 60km from Brussels.
http://www.grandcasinobrussels.be/nl/games/