The full story
Start with lambic, the spontaneously fermented beer historically associated with Brussels and the Senne valley. Young and older lambics can be blended and refermented in the bottle to make gueuze, usually dry, tart and complex rather than conventionally bitter. Kriek introduces cherries, though sweetness varies widely between traditional and more commercial versions. Tasting smaller pours side by side makes those differences clearer than ordering one strong beer after another. Trappist, abbey and modern craft beers broaden the Belgian picture, but they are not all Brussels styles. Read the glass as part of service culture: many beers use shapes chosen to support aroma, foam and identity. Pair tasting with food and water, note alcohol strength before ordering, and avoid turning a long brand list into a quality ranking. A focused café or brewery visit should explain process as well as provide variety.