Much as Marcel Duchamp's Nude Descending a Staircase was the icon of the 1913 Armory Show, Darren Bader's Guacamole French Horn is the centerpiece of last weekend's Frieze Art Fair on Randall's Island. Visitors to the Andrew Kreps Gallery booth there could dip their chips into an endless supply of guacamole, gurgling out of a gorgeous (and expensive) French horn.
