Richard Linklater and Ethan Hawke have collaborated for over 30 years, but their latest film, "Blue Moon," pushed their partnership to new limits. The film, set over one night at Sardi’s, focuses on lyricist Lorenz Hart. Linklater admits he pushed Hawke hard during production. Hawke embraced the challenge, despite initial stress. The film explores Hart's complex character and his partnership with Richard Rodgers. As Rodgers moved on with Oscar Hammerstein, Hart was left behind. Linklater describes the film as a poignant reflection on artistic careers, capturing both beauty and devastation. “Blue Moon” opens in New York and Los Angeles on Friday and expands next week.