Anyone have any thoughts on decent gyms in the Brussels area?

Depends on how much you're prepared to pay and how far you're willing to travel to get there. I'm a member at Physical Golden Club on place du Châtelain, mainly because a friend got me a very good deal there and I have 2 other friends who work out there. It's a basic neighborhood gym, nothing special. If I had the money and worked in central Brussels, I'd probably join Aspria. I've also heard that the Club Med Gym is very state of the art, but the catch is there's no parking.

I was a member of the Golden Club for 3 years, but I have just let my membership go. I have heard good things about Aspria and Club Med. I have tried the gym at Champery's (Conrad Hotel) and while it is lovely it is extremely pricey!