Fireworks, Cake, Paul Anka: Nothing at the Plaza Could Heal Matthew Broderick’s PainThe Plaza Hotel’s 100th anniversary last night ought to have been a joyous celebration. The Orchestra of St. Luke’s played a forties-Hollywood soundtrack. Yitzhak Tshuva, the Israeli mogul who turned the hotel into condos, smiled and laughed among some 200 family members and his favorite singer, Paul Anka. Gucci brought really cool fireworks — they even shot rockets off the roof of the building — and a twelve-foot, one-ton Ron Ben-Israel cake in the building’s image was admired and then eaten. And it was good. And yet, Matthew Broderick, there to toast the happy occasion, could barely contain his sorrow.