blog Glenn O’Brien visits the Jack Spade shop, where Warhol’s “business art” ruse finds new life in this boutique/gallery/lending library/kiosk/hangout. Jack Spade is the men’s counterpart of the successful American handbag and more company Kate Spade, but Jack has a mind of its own. It’s the creation of Kate’s husband Andy who had a long career as an advertising creative before they started the fashion company. Andy is also a prescient art collector and about as close as a businessman can get to being an artist. In fact he’s sort of what Andy Warhol was getting at when he talked about “Business Art.” The little Jack Spade store on Greene Street in Soho is a gem. It’s a boutique, but it’s also sort of an art gallery and kind of a clubhouse, with comfy furniture, ash trays, good music, art books and an actual lending library. Sometimes Andy exhibits art…