Barbara Walters was the life of the holiday party for “The View.” Sources said she was “on the dance floor the whole night” at P.D. O’Hurley’s on West 72nd Street Tuesday night. One spy said, “Barbara and Sherri Shepherd were tearing up the floor to disco tunes. Whoopi Goldberg hung out for a good while chat ting to other members of the production team and crew, while Elisabeth Hasselbeck couldn’t stay for long.” Mean while, CBS anchor Katie Couric hosted a more sedate holiday lunch at Fresco by Scotto this week, dining on pasta dishes with fellow staffers.