Attendants of the EAC2017 can book a selection of hotels at fixed rates via Zurich Tourism using the following link (rooms starting at CHF 150 per night and person):
Hotel reservation EAC 2017
The block reservation at fixed rate is only available until Wednesday July 26, 2017.
Plenty of additional accommodation, some of it at better rates than the block reservation, can be found on the portal of Zurich Tourism: https://www.zuerich.com/en (menu “where to stay”), or via common commercial booking portals.
There is also a Youth Hostel in Zurich: http://www.youthhostel.ch/de/hostels/zurich
Beside hotel rooms, short-stay apartments may be found via https://swiss-star.com/?lang=en or https://www.airbnb.com/