Anne Seelbach will teach private watercolor classes at the Victor and Mabel D’Amico house in Lazy Point, Amagansett, starting Saturday and Sunday from 10 a.m. to noon. The Sara Nightingale Gallery in Water Mill will open concurrent solo exhibitions of work by Cara Enteles and Stephanie Brody-Lederman with a reception on Saturday from 5 to 7 p.m.