On my way to the Whitney Biennial, I stopped by Gagosian Gallery across the street to take in the Damien Hirst show, "End of an Era." Gagosian's uptown souk is reminiscent of the old Andre Emmerich Gallery on 57th Street: it has a main room made for showing and a bunch of side venues, public and private, which are really more like viewing rooms in a fashion house or examination rooms in a doctor's office. It's a nice architectural trick to put the client-buyer-patient psychologically off balance.