Actors take note: Center Stage at the Southampton Cultural Center will hold open auditions for Tracy Letts’s “August: Osage County” on Jan. 18 at 3 p.m. and Jan. 19 at 5 p.m. at the center. Winner of five Tony Awards, including best play, “August: Osage County” takes place in the Oklahoma home of Beverly Weston, a 69-year-old alcoholic and former poet who has disappeared, and his wife, Violet, a manipulative alcoholic and addict.