Any definate places to avoid? I've heard a minority of Anderlechts lads can get rather rowdy.
Not sure about that, most people who live in the city of Brussels aren't Anderlecht supporters. They don't go to football games. Outside the city, there are more, but as it is a working day, I don't expect troubles. The supporters of Anderlecht live in all parts of Belgium.
We (Club Brugge, big rivals of Anderlecht) played the last 2 years the Cup Final in Brussels, and before the game we were at O'Reillys and at the Grand Place. We never had any problems. Police will also keep an eye. The only problem can be the tube I think after the game, when they lost!