I would highly recommend De Kelk pub (Langestraat 69) in Brugge. It only opens at 5pm and has an incredible range of beers. Also Staminee de Garre, 't Brugs Beertje, 't Poatersgat and Cambrinus.
The "bicycle" place in Ghent is called 't Velootje, but a friend was there a few weeks ago and reported the following; if you want to "experience" the eccentricity of this place and it's owner, fair enough. But expect to pay 6 or 7 euros for a bottle of beer without a glass. If you ask for a glass, don't expect a clean one! You have been warned. Waterhuis an de Bierkant is good with a great selection, but suffers from employing a couple of wait staff who seem indifferent.