Laurent Asscher wanted to know if I had seen the Tino Sehgal . The collector’s AMA Venezia , an art foundation he established last year in La Serenissima, was packed on Monday, on the eve of the press preview of the 61st International Art Exhibition of La Biennale di Venezia . Some 1,600 people passed through—artists, collectors, dealers—all in town for the art world Olympics. Inside, exposed brick walls feature sparsely installed trophy works by top contemporary stars like Ed Ruscha , Christopher Wool , and Jenny Saville , as well as hot emerging artists Joseph Yaeger and Sang Woo Kim . Asscher couldn’t conceal his excitement about the Sehgal, but would reveal little about it. “It’s a couple,” is all he would offer, “behind the black curtains.” I left my unfinished glass of Prosecco on a table and stepped inside. It was pitch black. I made uncertain steps, keeping my hand on a wall. I couldn’t seen anything, just felt a volume of space and sensed there were bodies around. Was there a video?…