Actually, the term "Fiesta Brava" is a synonim of "corrida de toros". There is no exact equivalent in English. Hope it helps. The term may be classified under "Other", as it is considered a sport.

It refers to bull fighting Toros de Lidia, special breed.
Bullfighting means Fiesta Brava.
Regarding names, you do not need to translate it.

Being a name should not be translated.
Fiesta brava is everything related to bull fighting, not only what happens in the bullring on Sundays at 4 pm.

For a restaurant, i would leve it in Spanish.

do you agree?

As the other posters have noted, the name of a restaurant does not have to be translated. In fact, leaving it in the original Spanish may add flair to the image as well as providing a theme for the hearer to imagine.
If translation is needed here, you might consider using an English phrase that would provide equivalent imagery without actually translating. Hemingway provides some worthy phrases in his bullfighting stories.