Revelers celebrated the 10th year of Art Basel Miami Beach in two ways: with private dinners or private parties.

Jeffrey Deitch, the hyper-social director of the Museum of Contemporary Art in Los Angeles, held both at the Raleigh Hotel. “This is the American equivalent of the Venice Biennale,” said Mr. Deitch, in purple, as he passed Alexandra Richards in the D.J. booth. “Social interaction has always been an important part of the art experience.”