Many of the magic events taking place in Barcelona are listed here: Magia en Barcelona
. Maybe you are lucky and you get the chance to see Joaqun Matas performing at Teatreneu.
Another possibility would be to go to SEI (Spanish Magic Society) both in Barcelona and Madrid. Every monday the society is completely full with many magicians sharing, teaching and performing and, in Barcelona, you will get the chance to see Oriol, Tino, Amlkar... (to name a few of the best) there.
Here is the link for SEI - Barcelona
Here is the link for SEI - Madrid