I live in Belgium as well.
As I'm just starting to play poker, I don't know a lot of places, especially not in your area. I've searched in my region (Genk) too, but have not found anything.
I've heard in Gent there is some small scale poker playing going on in 'Het Verdronken Land' on Tuesdays, but that's quite far too.
If there is anyone out there that knows another place, don't hesitate to let us know