If you were invited to the Spanish country house of an eccentric artist who had a kitchen full of wine and made over 40 tapas dishes, you’d probably want to bring a few friends and never leave. That’s pretty much the experience at Dali on the Somerville-Cambridge line. Start with a pitcher of sangria or a Spanish red, order several dishes that have pork in them, and try to determine the artistic intent of the string of lingerie hanging over a mirror in the dining room.