An air of excitement pervades the headquarters of Greece’s far-left Syriza party. In small, smoke-filled rooms, off corridors plastered with posters advertising Marxist seminars and cluttered with coffee cups and leftover meals, staff pore over computers. Most are women, young and intense, cigarettes dangling from lips as they tap into keyboards. The hubbub of chatter is loud. Up narrow staircases people zoom this way and that. For the visitor there is no mistaking that the seven-storey building, overlooking one of Athens’s more rundown squares, is as much a place of workable chaos as it is a well of expectancy.