In the Puerto Viejo de Algorta in Getxo there's a cool area with a lot of pubs where you can go have some tapas. Apparently on weekends it gets pretty full, with people on the streets or on the stairs, but during the week is a great time to go, too. The Itxas Bide Tavern isn't a touristy place at all, a lot of locals go there. It's the perfect place to have some good tapas. It's a good place to go that's outside of the usual tourist traps and it has pretty fair prices.