Barcelona has a large number of hotels - in each part of the city, and of each price catagory - from expensive luxuory resorts, flats and appartments, B&Bs, to cheap and simple (but sometimes very noisy) hostels and dormitories.
As prices regularly change and often depend on the demand of the moment, we do advise you to check and compare them before booking, using one of the popular booking websites. Because of the travelling to and between the meeting sites and the visits, we recommend to book next to the L4 (yellow) or L5 (blue) metro lines . As Barcelona has an excellent public transport, servicing a large area also around the town, don't be afraid to book a hotel at the outskirts or even in nearby municipalities as Gavà, Sant Adrià, ...
The main tourism office of Barcelona is situated at the Plaça de Catalunya - one can find there all kinds of brochures, information, and they will be pleased to help you (in different languages)
To look for a hotel, check and compare