Walking around Brussels will make you thirsty. If you're looking for a nice and typical place to have a pre-luncheon drink or one of the 400 Belgian beers, an Irish coffee (very popular) of just a coke or a plain glass of water, drop in at the 'Chaloupe d'Or' (golden rowing boat) on the Grande Place.
Cosy interior of the 'Chaloupe d'Or'.
It's not cheap, because in this district nothing is. But the atmosphere is great, with an open fire place, burning winter and summer, a lot of wood and antique objects.
P.S. The day before yesterday I forgot to ask you which legend you favour about Manneken Pis: the fuse or the witch's curse?