Paris has about 1,625 hotels and an excellent subway system. As a result, there is a huge selection of accommodations you can choose from.
It might be a good idea to look for accommodations connected to Metro Line 14, which is fast and connects the conference venue at the Boyer Center (the “Bibliothèque François Mitterrand” stop) to Bercy, the Gare de Lyon, Châtelet (RER Line B to CDG Airport) and Madeleine (conference dinner) on one side, and Orly Airport on the other. Be aware that prices vary and change frequently.
If you prefer to stay closer to the conference venue, possible options are
Ibis Styles Tolbiac Bibiliothèque https://all.accor.com/hotel/7976/index.fr.shtml
Appart'City Collection Grande Bibliothèque https://www.appartcity.com/fr/destinations/france/ile-de-france/paris/paris-grande-bibliotheque
Hôtel Le Richemont https://www.hotel-richemont.com/fr/page/quartier-hotel-bercy.4853.html
Mercure Bercy Bibliothèque https://all.accor.com/hotel/0934/index.fr.shtml
Ibis Styles Paris Bercy https://all.accor.com/hotel/0941/index.en.shtml
Pullmann Paris Centre – Bercy https://www.pullmanpariscentrebercy.com/en/