I have a small apartment in Barcelona. It's very conveniently located close to Sants railway station. It's just 10 minutes to the centre of the city with the underground tube.
There's WiFi available for you.
The flat has two bedrooms and you will be staying in the big one with a big bed. The bed can perfectly accommodate two people.
This is perfect place for a single person or a couple. And the room is much nicer and cheaper than any hostel in Barcelona.
27 € / night