Blythe Danner — the vivacious star of “Nice Work If You Can Get It” — wants to make a rather dramatic final exit one day. “I’d want to perform in a nice play, do a curtain call and drop dead,” she was overheard joking backstage to a well-wisher at the Imperial Theatre. She was also heard saying that when she’s not on the stage, she’s got an unofficial job as Gwyneth Paltrow’s culinary assistant. “My daughter’s a great cook, and I’m her sous chef,” Danner said. “And I’m good at it.”