John Demsey, executive group president of Estée Lauder Cos., celebrated his 60th birthday Thursday night by throwing a dinner party for 120 of his friends and colleagues at Mr. Chow’s on 57th Street. Among the crowd that filled the restaurant were Katie Holmes, Zac Posen, Terry Lundgren and William Lauder, who set the tone by toasting the event as “the 10th anniversary of John’s 50th birthday.”