There are plenty of options for accomodation in Košice. Many of the hotels are within walking distance from conference venue.
You may prefer one of the following recommended hotels.
Hotel Teledom
Timonova 27
Villa Regia
Dominikánske námestie 3
City Residence
Bačíkova 18
Rokoko
Gorkého 9
Hotel Maratón
Strojárenská 11A
As an alternative, you may book a hotel via Booking.com website.