Laurie Anderson, the musician and visual and performance artist, will make a whirlwind tour of East Hampton next week. On Wednesday at 6 p.m., she will speak at the Art Barge on Napeague in the final installment of its 2016 “Artists Speak” series. Andrea Grover, curator of special projects at the Parrish Art Museum in Water Mill and incoming executive director of Guild Hall in East Hampton, will moderate the discussion.