The city of Ghent hosts a large number of fine hotels and B&B’s. A very good search platform for finding a nice place in Ghent to stay during the conference can be consulted at http://www.visitgent.be or http://www.booking.com/
See also:
http://www.marriottghent.com (around 140 euros per night)
http://www.ghent-river-hotel.be (around 100 euros per night)
http://www.theboatel.com/ (around 90 euros per night)
http://www.ibishotel.com/gb/hotel-0961-ibis-gent-centrum-st-baafs-kathedraal/ (around 80 euros per night)
http://www.ibishotel.com/gb/hotel-1455-ibis-gent-centrum-opera/index.shtml (around 70 euros per night)
http://www.monasterium.be/ (f.i. single standard guestroom: 46 euros, breakfast not included)
http://www.hostel47.com/en/ (dormitory, around 24 euros per night)