★ CRG PRESENTS: KLAUS VON NICHTSSAGEND GALLERY Including works by Liz Luisada, Samuel Lopes and Thomas Ovilsen, this group show of work by 17 emerging artists definitely has its moments, but the strongest impression is made by the gallery-within-a-gallery effect resulting from the re-creation of the storefront facade and reception desk of the small Von Nichtssagend Gallery in Williamsburg, Brooklyn. CRG Gallery, 535 East 22nd Street, (212) 229-2766, through July 28. (Smith)