Stand-up comedy
Borowitz's success as a television performer led to his becoming a strong draw as a stand-up comedian, and he started headlining at major comedy clubs across the country, including Carolines on Broadway, where he hosts a monthly show called Next Week's News. Other major comedians who have appeared with him in that show include Amy Sedaris and Susie Essman.
For four consecutive years starting in 2004, he performed at The Comedy Festival in Aspen, Colorado.
In September 2007, he headlined an edition of Next Week's News at the Bumbershoot festival in Seattle, Washington, performing to standing-room-only audiences and critical acclaim in the press, including the Seattle Post-Intelligencer. He also performed to a sold-out house at the 2007 New York Comedy Festival, which featured other prominent comedians including Denis Leary, Bill Maher, and Sarah Silverman.
In 2008, he hosted a series of sold-out shows at New York City's 92nd Street Y called "Countdown to the Election". The show earned rave reviews and featured such guests as Arianna Huffington, Mo Rocca, Jonathan Alter, Joy Behar, and Jeffrey Toobin.
He continued to tour the country performing stand-up, including a performance at the University of California, Santa Barbara in April 2008. The university newspaper, Daily Nexus, reported that Borowitz played to a packed house and had the audience "erupting with laughter".
Comedian Mike Birbiglia praised Borowitz in a May 2009 profile in Harvard Magazine: "Andy just picked up stand-up comedy as a hobby, and he's as good at it as anybody."
On November 28, 2010, CBS News Sunday Morning aired a retrospective of his career as a comedian and writer, calling him "one of the funniest people in America".
On June 28, 2011, he performed at New York City's Central Park Summerstage and drew a crowd estimated at 5,000, setting a new record for turnout at a Summerstage spoken-word event.