A New Orleans-style “Layla” with a gospel kick was the surprise addition to the concert Wynton Marsalis and Eric Clapton performed last night in Jazz at Lincoln Center’s Rose Hall.

It was the one Clapton song in a program focused on traditional blues.

“Wynton brought it up in rehearsals, and Eric said the only way he’d do it is if it’s New Orleans-style,” trumpeter Marcus Printup said at the post-concert gala dinner at Roseland Ballroom. Marsalis arranged the song overnight “and Eric took care of the rest,” said Printup.

Preparing to dig into a chocolate cupcake, Printup then recalled his own favorite moment of the concert: when Clapton said he was nervous.

“He looked nervous, too! What it reminds me of is that I’m a firm believer that you can always learn more,” Printup said.

The combination was winning on stage and off. The gala event raised $3.6 million for Jazz at Lincoln Center, drawing an eclectic crowd including” Lloyd Blankfein, chairman and chief executive of Goldman, Sachs & Co.; Newark, New Jersey, Mayor Cory Booker; singer John Legend; and Glenn Lowry, director of the Museum of Modern Art.