Good day, San Francisco: July 25

Big Valli: Cast members from “Jersey Boys” will perform a medley of hits from the show during an appearance in Union Square. The Tony-winning musical tells the story of Frankie Valli and the Four Seasons. [12:30 p.m., Powell and Geary streets]

Who’s in town

New York-based virtuoso guitarist Stephane Wrembel is one of the many musicians appearing at “Jazz on Grant,” the multivenue kickoff presentation of the 2007 North Beach Jazz Festival. [Wednesday evening at various North Beach sites (Wrembel appears at Amante, 570 Green St.); schedule at www.sunsettickets.com]

City activities

At the ballpark: The S.F. Giants play the Atlanta Braves. [7:15 p.m., AT&T Park, 24 Willie Mays Plaza]

Meet Ted Egan: S.F.’s chief economist talks about his new position and the role of the Office of Economic Analysis. [12:30 p.m., SPUR, 312 Sutter St.]

At the public library

Business counseling: The Service Corps of Retired Executives offers free sessions. [10 a.m. to 3 p.m., Main Library, Business Center, 100 Larkin St.; call (415) 744-6827 for an appointment]

Peace Corps: The group holds a general informational meeting. [6 to 8 p.m., Main Library, Stong Room, 100 Larkin St.]

Lectures

Michael Tucker and Jill Eikenberry: The actors discuss their adventures in Italy. [Noon, Commonwealth Club, 595 Market St.]

Pamela Swingley: The Savvy Internet Marketing president provides an overview of major trends in the fast-changing world of online marketing. [6 p.m., Commonwealth Club, 595 Market St.]

Literary events

David Talbot: The Salon founder discusses “Brothers: The Hidden History of the Kennedy Years.” [6 p.m., Commonwealth Club, 595 Market St.]

Richard K. Morgan: The Scottish sci-fi writer discusses “Thirteen.” [7 p.m., Booksmith, 1644 Haight St.]

Warriors vs. Mavericks preview: Another series, another superhero

Round after round, Golden State has faced the NBA’s best. Next up, Luka Dončić

Homelessness is a housing problem, but also a political one

New book seeks to disabuse people of their misconceptions of homelessness

Batteries are powering defection from the electric grid

“Minimizing my impact on the planet is something I’ve been working on since I was, like, 13 years old.”