I second Delirium Tremens. Belgium is like Candyland for beer lovers.
Been there many times.
My favorite beer festival is in the Grand Place, Brussels. Three days of over 300 different Belgian Beers. Think I been there six times for it.
They used to hold a much smaller more private festival every other year the following weekend in Brussels called Bruxellenses. It was mainly lambics.
I’ve been away from brewing for a few years, although it still holds my heart. I’m an amateur, but my brew vat with circulator pump is 165 gallons. A friend from Holland borrowed it and opened a brewery.
I’m spoiled now as I live in an area where 50+ beers on draft is common. I can enjoy, without brewing.
Joe, the owner of Delerium Tremens (over 2000 different beers) opened an absinthe bar across the street called Floris Bar. Floris Bar is famous for Absinthes (over 600) and more traditional alcohols: Gins (a hundred), Whiskeys (more than 200 ), anise and liqueurs.
We closed the beer festival and then drank all night with Joe until the festival opened again the next day. I’m too old for that now!
https://www.deliriumvillage.com/bar/floris-bar/