Why not try couchsurfing? Either hosted by a local participant or organizer (ynhm2017@gmail.com) or through couchsurfing.com.
Otherwise, rooms in a variety of hostels, Bed & Breakfast or hotels are available in Paris at a range of prices and can be reserved through the usual channels. A succinct list is given below (prices are given as an indication).
Hostels:
- MIJE
- FIAP Jean Monnet, 30 rue Cabanis, 75014 Paris
- Young and Happy Hostels (~25€), 80 rue Mouffetard, 75005 Paris
- Oops Design Hostel, 50 avenue des Gobelins, 75013 Paris
- Cisp - Kellermann (~30€, including breakfast), 17 boulevard Kellermann, 75013 Paris
- BVJ Centre International Paris Quartier Latin, 44 rue des Bernardins, 75005 - Blue Planet Hostel (~25€), 5 rue Hector Malot, 75012 Paris
- La Maison des Mines et Pont et Chaussée, 270 rue St Jacques, 75005 Paris
- Maison Internationale - Cité Universitaire, 17 boulevard Jourdan, 75014 Paris
- Aloha Hostel, 1 rue Borromée, 75005 Paris
Bed & Breakfast:
- Une chambre en ville (~35€), 10 rue Fagon, 75013 Paris
- Good Morning Paris (~70€, 2 night min.), 43 rue Lacépède, 75005 Paris ; www.goodmorningparis.fr
Hotels:
- Hotel de la Place des Alpes 2* (~50€, breakfast 6€), 2 place des Alpes, 75013 Paris
- Libertel Gare de l'Est français 3* (~75€, breakfast 12€), 13 rue du 8 mai 1945, 75010 - Grand Hotel Voltaire 2* (~75€), 150 boulevard Voltaire, 75011 Paris
- Hotel Moulin Vert 2* (~65€), 74 rue du Moulin Vert, 75014 Paris
- Hotel Timhotel Place d'Italie Butte aux Cailles 2* (~68€), 22 rue Barrault, 75013 Paris
- Hotel de Blois (~75€), 5 rue des Plantes, 75014 Paris
- Hotel Stanislas 2* (~80€), 5 rue de Montparnasse, 75006 Paris
- Hotel des Mines (~90€), 125 boulevard St Michel, 75005 Paris
