Julie Andrews and Emma Walton Hamilton will be at Bay Street Theater with their new children’s book, and the comedian Joseph Vecsey will perform a live taping of his new show.

Bay Street Theater has added Terrence McNally’s play “Master Class” and a one-woman show by Julia Motyka to its summer season.

A.R. Gurney’s play “The Dining Room” at the Southampton Arts Center opens a window on the mores of upper-middle-class WASP life.

Classical piano and dance party at The Church, reception and panel at LongHouse, Judy Carmichael at the American Hotel, Italian songs of the sea in Montauk.