Kuba G
Google
Definitely unique place for climbing in Brussels. Real _bouldering_ spot!
Under industrial reading that's right now includes skatepark, some art centers and on the almost top floor there is a bouldering space.
The blocks are not that tall around 4 metres height. The boulders are graded by holds colours. Nice setting with varied techniques. You can also use some training space with campus, stretching and overhang.
Just by the mat you have an open bar with picturesque views on the city!
Judging by gym itself it's 4* place but knowing other options in EU capital it deserves full 5* recommendation.