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