Stop by the Grand Platz in Brussels and see what's going on there. Lot's of cool and notable buildings, and maybe a parade or festival.

Then, duck in a hotel and ask the desk to recommend a seafood restaurant among the cafes that line a series of alleys nearby. They all look good, but some offer a more genuine and local experience than others that are catering to tourists. A good recommendation for where the locals eat helped me find a fine meal!

I had to zip across town on the bus on business while there, and saw many lovely parks and lakes. If time allows, do some exploring in some of these places.

JP