We were in Brussels about 20 years ago and found a large old beer store near the Forêt de Soignes and/or Waterloo. It was large, fairly dark and dusty, rickety floors, many different kinds of beer, and lots of matching steins. Definitely a one off, not a chain. But, we can't remember its name or exactly where it was. Might have been "Drink's Wet" or "Trink's Wet" Any ideas?
I am not familiar with that, but if you are looking for a wonderful and large beer “palace”, take a day trip to Ghent’s De Hopduvel (https://www.beeradvocate.com/beer/profile/23673/). There are a lot of beer places in central Brussels but I find their prices are marked up pretty high for the tourists. Maybe a local RS posters can lead you to a better location in Brussels. Cheers.
We were in Brussels about 20 years ago
This one has great selection too https://beermania.be/