Tapas means little dishes.
I don't know any tapas bar in Barcelona. When I eat them I usually go to Castelldefels. It's a village near Barcelona, in the beach.
I tell you what can you eat in Spanish (well, what I like the most...):
- Patatas bravas
- Calamares a la romana
- Sepia a la plancha (only in some bars)
We usually ask for 7-8 dishes for 4 people; and then we eat a very big ice ceam.