Barista was the name sometimes applied to employees who served coffee at cafés.
In 2013, one barista was controlled by Rosemary Kizlet to say to Eleventh Doctor that he couldn't protect Clara Oswald. (TV: The Bells of Saint John)
A barista at the café that Naomi Davies and Rab met at shouted that he had somebody's order of a decaf latté and a bacon muffin with brown sauce. With nobody coming forward to collect it, he threatened to throw it away. (AUDIO: Embankment Station)