yeah, if you *like* techno
Things to do... I'd not try to take too many tours, they tend to take a while, and frankly, it never makes me care any more about the town.
Depending on your alcohol tolerance, you can try out several beers.
Chimay, West-Vleteren, Duvel, Kriek (Lindemans or Liefmans), Leffe, and try out Jupiler or Maes. It's the regular beer you get on tap, but I like it alot.
For food, I'd look for: Stoofvlees/Stoverij with fries, Mussles, or just go into a frietkot: we've got fries on the go with more snacks and different sauces than you'll have time to try.
Definitly try some waffles or pancakes if you have the chance. And chocolate, either to take home or if you like it yourself (in Ghent):
http://www.chocoladebar.be/
While you're there, I advise you to step into a supermarket, and buy some speculaas & peperkoek to try out.
And buy yourself an americain préparé-sandwich for lunch.
(So far, I haven't found all 3 of those outside of Belgium, yet I think they're great)
As for stuff to actually do, I would suggest sticking to the bigger cities unless you've got time to kill.
1 straight line is : Brussels, Ghent, Bruges.
Brussels: the Atomium's been renovated 2 years ago, so it's shiny again.
Manneke Pis is.... meh, it's a statue of a little guy peeing, how is this such a hit abroad I wonder.
There's enough to see in Brussels to fill all your time. Depends on if you're into museums and monuments and such...
Ghent: Step inside the medieval castle and have a look around for yourself.
Also: lots of houses with very old fronts, sort of a warm-up to Bruges
Good shopping if you're into that.
Bruges: Maybe the one place where a guided tour is warranted... But I still prefer to walk by myself.
As far as the evenings go, we've got a few big dancings/clubs left (alot closed over the last 10 years). We've also got alot of dance-cafés (sort of smaller, same idea really, more variation in the choice music though).
Or you just go to a local bar.
That part is up to you really. Depends on where you'll actually be at