Several accomodations near CentraleSupélec may be recommended:

• La Maison de l'Abbaye, in Antony (http://www.mam-antony.fr/): 25 minutes walk to CentraleSupélec Campus, next to the RER B station (to center of Paris);
• Hôtel de Berny, in Antony (http://www.hotel-berny.com), 25 minutes walk across Parc de Sceaux to CentraleSupélec Campus;
• Hôtel Le Colbert, in Sceaux (http://www.hotelsceaux.fr/), 25 minutes walk to CentraleSupélec Campus;
• Hôtel Alixia, in Antony (http://www.hotel-alixia.com/), 25 minutes walk to CentraleSupélec Campus, 5 minutes walk to RER B station (to the center of Paris).

Other accomodations may also be chosen in Paris, near the RER Line B. To come from the center of Paris (e.g. Châtelet-Les Halles RER station) it takes 20 minutes by RER B to Antony, then 8 minutes by bus 395 to CentraleSupélec.