Barcelona has many excellent hotels that are suitable for conference delegates.
Find some accommodation here http://www.booking.com/landmark/es/la-pedrera-casa-mila
Find out more about Barcelona here http://www.barcelona.cat/en/
The map below shows
A. the location of La Pedrera (Casa Mila), the Conference venue
C. the location of the University Pompeu Fabra campus, the Worshops venue
La Pedrera https://www.google.es/maps/place/Casa Mila and Universitat Pompeu Fabra https://www.google.es/maps/dir/UPF