In this April 21, 2010 file photo released by CBS,...

In this April 21, 2010 file photo released by CBS, host David Letterman is shown on the set of the "Late Show with David Letterman," in New York. Credit: AP

GABRIEL ON LETTERMAN The latest "Live on Letterman" webcast concert streams Wednesday at 9 p.m., after Peter Gabriel tapes his appearance on "Late Show With David Letterman." He'll perform tracks from his fresh album "New Blood" with a full orchestra at Manhattan's Ed Sullivan Theater. Watch at cbs.com/lateshow.

UPRIGHT COMEDY Head into the city for kickoff of Corporate Retreat, a series of twice-monthly shows sponsored by Comedy Central at UCBeast, 155 E. Third St. (at Avenue A). Monday's 8 p.m. show features Wyatt Cenac, Kurt Metzger, John Mulaney, Tom Papa, John Roberts, Dan Soder and local girl Amy Schumer. Details at east.ucbtheatre.com.

MORE CITY COMEDY It's time for this year's New York Comedy Festival, sponsored by Comedy Central. Running Wednesday through next Sunday, the event at various venues features big names like Ricky Gervais, Louis CK, Kathy Griffin, Wanda Sykes, Bill Maher, Russell Peters, Sarah Silverman and Tracy Morgan. Info at nycomedyfestival.com. -- Diane Werts

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