Zythos Beer Festival in Leuven
An enthusiast-run beer festival inside Leuven's Brabanthal exhibition hall, organized by the Zythos association rather than a brewery or city tourism board. Around 100 breweries pour several hundred beers via a prepaid token system, with a lineup weighted toward small, regional, and rare styles rather than well-known exports.
Zythos vzw, a Belgian beer-enthusiast association with tens of thousands of members, runs its own festival hall in Leuven stocked with beers most drinkers have never heard of.