Hilton La Defense Parsi
 

Looking for updated info on the Hilton LaDefense, Paris

I will be tagging along for a business trip and will be staying here for 7 days (April).

Any decent restaurants in this area of Paris? Other than traveling to the heart of Paris, is there anything in this area that shouldn't be missed?

Versailles is just a short train ride away.

Google '10 top things to do in La Defense' and you'll find quite a few ideas. Do check Tramway and train for visiting Paris from there. PalenQ, did you train to Versaille from there? Any special station to start from?

Here's a trip report about La Defense--hope it gives you some info.
La defense - Fodor's Travel Talk Forums

I took the 258 bus from La Defense. Easy to find. Few visitors besides me. Lovely place to spend a day.

https://en.wikipedia.org/wiki/Ch%C3%A2teau_de_Malmaison

Yes trains go from La Defense to Versailles River Droit station in town center - coming from Saint Lazare.