The violinist Stefan Arzberger had planned to play the music of Beethoven, Haydn and Mendelssohn with his colleagues in the Leipzig String Quartet later this month at Wigmore Hall in London, where he fondly recalls once sipping sherry with patrons after a concert.Instead he finds himself facing a charge of attempted murder in New York City, accused of barging naked into the room of a 64-year-old woman at a Midtown hotel he was staying in while on tour this spring and trying to strangle her. His defense is hardly less lurid: His lawyers say he was drugged by a prostitute...