Jay-Z last night made his first public appearance since his wife, Beyoncé, gave birth to their daughter, Blue Ivy Carter. The rap icon apparently left mom and baby at home as he celebrated the re-opening of his 40/40 Club on West 25th Street. Jay-Z darted past the press on the red carpet without saying a word. Beyoncé was nowhere to be seen, and was presumably home caring for their 11-day-old daughter. But some of Jay-Z’s pals made it out for the opening — including billionaire investing tycoon Warren Buffett.