This is by far one of my favorite cities to visit and was so lucky to have been able to call it home before we made the decision to move to the Bordeaux region. These are my suggestions for your visit in Barcelona.
Bullrings are found in only 10% of French territory and mainly in the South of France. In Captieux, about 20 minutes from Bazas, there is a small bullring used in the amateur bullfighting circuit every year for the Rugby y Toros.
What I discovered while working in Barcelona, was that I loved sharing local food experiences with people visiting. Where someone might mistake the 'local' cuisine to be paella and tapas...which is not Catalan and not local...I was able to introduce to fideua catalane or butifarra.