To celebrate the launch of his New York gallery (in the landmark Bank of New York Building on Madison Avenue), French gallerist Emmanuel Perrotin hosted an art carnival in the Russian Tea Room. Several of his artists made — and sometimes manned — booths where party-goers could make spin art (Damien Hirst), grab a stuffed toy with a claw machine (Takashi Murakami), or play a game of ring toss (Daniel Arsham)…