Are you flexible with your travel dates? Look at what's happening in the upcoming months at Parc des Expositions de Metz and time your stay with an event that's of interest.
If you're going to Parc des Expositions de Metz in Grigy-Technopôle - La Grange-aux-Bois, make sure you leave time for some other places too. After you've covered off this events and conferences venue, Centre Pompidou-Metz is in the area will keep you entertained for a while longer.