Speaking of abundant collections of beers, this bar in Ghent, Dulle Griet, boasts a choice of 500 beers. It has a great interior, and, I was surprised to learn just now, you can go inside via Street View [0]. It has these cool multi-liter (can't remember exact capacity) beer glasses that look like something out of a chemistry lab, because of their shape, and the fact that they come with a wooden frame for support. You can see an image of one on the wall right of the bar, near the winking cartoon man and the word "MAX" in big lettering [1]. And, if you look up at the ceiling, there's a curious looking basket there. Comes evening, it has a bunch of non-matching shoes in it, because when you order that big-beer-glass-with-frame they take one of your shoes, lower the basket, put it in, and raise it again. You get the shoe back when you return the glass intact!
Downside is that the bar is pricey and touristy, and most of the beers seem to be commercial. We were in this bar in Bruges last winter, it has 300 kinds of beer and all from small breweries. If a brewery is acquired by a big company, they don't serve it anymore. They also have almost no tourists there, which is refreshing for Bruges. I'll try and find what it's called.
Edit: The Bruges bar is called Le Trappiste [3]. Apparently, it's well advertised in touristic literature. They even have a website.
