Teorema is a corner bar in Gros, a couple of streets back from Zurriola beach. There is a pavement terrace, and the crowd is a mix of neighbours, surfers and people who have walked over from the old town.
Music is the reason to come. The bar runs vinyl sessions with local DJs, mostly funk, soul and rare groove, each one with its own printed poster. Cocktails and premium spirits rather than a long list.
It is a mixed bar rather than a gay one, and it works as the first stop of an evening in Gros, before the old town fills up.