In reply to Stairclimber:
It depends what you mean by "around Barcelona" - if you don't mind travelling for a couple of hours you have the whole of the Prades and some of the nearer Lleida crags to choose from.
There is also the spectacular (but sometimes scarily bolted) Monserrat.
If you're looking for something nearer, here are a couple we've been to, though there are plenty of others too:
Cellecs - bolted slabby granite, plenty in the easier grades
Grau dels Matxos - a spectacular crag though not much below 6a.
