New York Studio School dean Graham Nickson’s beach paintings have been described as “extreme, impenetrable, and haunting” for their isolated figures inhabiting landscapes pared down to horizontal bands of color. Here, a lone figure’s ambiguous activity (Is she shielding her face from the sun? Reading a giant book?) lends mystery and import to a leisure activity that might otherwise be overlooked. (On view in ‘Summer!’ at Betty Cuningham Gallery on the Lower East Side through August 2nd).