At Kitchen Gala, Seeking Baking SuppliesThe Kitchen is a forward- thinking arts center in Chelsea, and yet it somehow manages each year to wrangle avant- garde musicians, performance artists, and all manner of downtown freak to a stately, 10021-style benefit gala. At this year’s installment, held this week, the main honoree was experimental-music star Laurie Anderson (it’s her 60th birthday), and serenading her from the stage were several next- generation stars not terribly accustomed to playing over the sound of scraping knives and clinking glasses. Each coped in his own way.