André Balazs and Andre Saraiva are teaming up on an underground pop-up club at The Standard, East Village, in time for Fashion Week. Chez André, an intimate raw space with a “live karaoke band,” launches a 22-night run tonight. The haunt will host a bash for designer Prabal Gurung tomorrow. Le Baron’s Saraiva has been decorating the spot with his street art, we hear. Meanwhile, at a Standard Fashion Week kickoff in the Meatpacking District Wednesday, the guests who got the most looks wore no clothes at all. A nude male and female model danced and shared Champagne on an 18th-floor Boom Boom Room balcony. Dressed guests included Calvin Klein, Brett Ratner and Theophilus London.