NEWARK, N.J. (AP) -- Conan O'Brien and Newark, N.J., Mayor Cory Booker have turned their frivolous feud into comedy on NBC's "Tonight Show."

During an appearance together on Friday night, they worked off one another like a comic duo. The jokes eventually gave way to a plug for Booker's efforts to fashion a national blueprint for urban transformation in gritty Newark and a $100,000 donation to his NewarkNow charity from O'Brien and NBC.

The 15-minute segment was the culmination of a facetious feud that began Sept. 23 with O'Brien joking that Booker's new health care program consisted of a bus ticket out of Newark, which is just west of New York City. Booker responded with a humorous video on YouTube in which he banned the "Tonight Show" host from Newark Liberty International Airport.