Halsey McKay TrifectaThe Halsey McKay Gallery in East Hampton is opening “Vanishing Acts,” a group exhibition of work by 13 artists, and a show of small landscapes by Lauren Luloff with a reception on Saturday from 2 to 4 p.m. The shows will run through June 2.The works in “Vanishing Acts” hint at corporeal presence without fully depicting the body. Faces, floating limbs, hand and footprints, uninhabited clothing, empty jewelry, and veiled ladies comprise the installation. While rooted in nature, Ms. Luloff’s paintings draw more from her imagination than observation.A show organized by the gallery of work by Denise Kupferschmidt will open at NADA House on Governors Island in New York City with a reception today from 1 to 5 p.m. and continue through Aug. 4.Celebrating Ken RobbinsA pop-up exhibition of work by the late Springs photographer Ken Robbins will take place at multiple venues on Saturday and Sunday from 10:30 a.m. to 4:30 p.m. The event has been organized by Fighting Chance, a free nonprofit cancer counseling center, which will benefit from a portion of sales.Robbins photographed the landscape, wildlife, and people of the East End for four decades. Selected by Elena Prohaska Glinn, Kathryn Markel, and Arlene Bujese, his photographs will be on view in Sag Harbor at the John Jermain Memorial Library, Grenning Gallery, Sara Nightingale Gallery, Tulla Booth Gallery, Julie Keyes Gallery, and the Fighting Chance offices, as well as in Bridgehampton at Kathryn Markel Fine Arts.A reception will be held at the Sag Harbor residence of Duncan Darrow on Saturday afternoon at 4:30. More information and a link to R.S.V.P. for the reception can be found on the Fighting Chance website.Visions and Workshops“Visions of Spring,” a show of paintings, drawings, photographs, and sculpture by members of the Artists Alliance of East Hampton, will be on view daily from 10 a.m. to 6 p.m. at Ashawagh Hall in Springs from Saturday through May 12. A reception will be held on Saturday from 5 to 7.Three workshops will be conducted during the run of the show: plein-air painting on Wednesday, watercolor and glass fusing on Friday, May 10, and flower painting on May 11. All workshops will take place from 11 a.m. to 1 p.m. In addition, “Let’s Talk Art,” an informal discussion, will be held on Wednesday from 5:30 to 7:30, to be followed by dinner at the Springs Tavern, where attendees will receive a 25-percent discount.Images From the Past“Retro,” an exhibition of work by more than 30 artists, will open today at the White Room Gallery in Bridgehampton and run through May 19. A reception will take place on Saturday from 5 to 7 p.m.The exhibition is a trip back in time, according to the gallery, inducing feelings of nostalgia by evoking styles, colors, and designs from the past. Images will include Valentino, a flapper from the Roaring ’20s, toys from the 1960s, the comic strip character Nancy, and Marilyn Monroe.Robert Hooke SculptureAn exhibition of sculpture by Robert Hooke will be on view at the Amagansett Library from Saturday through May 31, with a reception set for Saturday from 5 to 7 p.m. Mr. Hooke creates animal and human forms with smooth surfaces and subtle flowing lines in marble, soapstone, alabaster, and patinated bronze. Eight Women, One Poet “The Women I Love,” a group exhibition, will open at Keyes Art in Sag Harbor with a reception on Saturday from 5 to 7 p.m. and remain on view through May 18. The show will include work by Liz Barber, Audrey Flack, Suzanne Hagerstrom, Melinda Hackett, Mary Jo McConnell, Tammy Smith, and Michelle Suna.The gallery will host a brunch on Sunday from 11 a.m. to 12:30 p.m., when the poet Star Black will read from and sign copies of her new collection, “The Popular Vote.”Alice Hope at MarkelSince September, the artist Alice Hope and students from the Hayground School in Bridgehampton have collaborated on an extensive sculpture as part of Ms. Hope’s residency there. The finished work, “Aeon,” will be on view at Kathryn Markel Fine Arts in Bridgehampton on Saturday and Sunday. A reception will be held on Saturday from 6 to 8 p.m.Ms. Hope is known for her public and private commissions, including a large-scale magnetic installation for the Parrish Art Museum at Camp Hero in Montauk and a six-month site-specific project outside the Queens Museum that used more than a million can tabs.Lieberman in SetauketGallery North in Setauket will open an exhibition of more than 25 paintings by Bruce Lieberman with a reception Friday from 6 to 8 p.m. The show will run through May 24.While the show will focus primarily on still lifes, many of them new, Mr. Lieberman, who has had a studio in Water Mill for many years, is also known for his landscapes and paintings of people. Whatever the subject, his primary obsession is painting — its materials, its processes, and its history.