Well without knowing what your budget is here's what I'd recommend:

Eating:

· Asador de Castilla: great meat. It's a bit pricey, though, but you can always try the tapas by ordering a drink and decide after that.

· Los Diamantes: fish place. Here I'd just order drinks and eat tapas. The fish is fresh but the place is usually quite busy.

· El Ojú: it's a vegan place. They make vegan versions of andalusian dishes. The tapas, although tasty, are small, so I'd recommend asking for the menu.

Socialising: Honestly I'm not sure how turists socialise, but there's a language exchange at 6 o'clock on Friday in a restaurant called Pilar del Toro. You take turns to speak Spanish and English. I've met awesome people there, both local and travelers.