Sept. 30-Oct. 1: Hardly Strictly Bluegrass, Ruin & Rose, Damien Lemon, Fortune Feimster, Seared, 3 For All

FRIDAY, SEPT. 30

Hardly Strictly Bluegrass: The 16th annual, three-day free extravaganza of mostly acoustic music, courtesy the late great Warren Hellman, opens, featuring early evening headliners Mavis Staples, Dave Alvin, Shannon and the Clams and Conor Oberst. [Noon to 7 p.m., Golden Gate Park, S.F.]

Official Unofficial Hardly Strictly Bluegrass After Party: The lineup includes Left Coast Country, The Mountain Men and Cool Pistol String Band. [9:30 p.m., Plough & Stars, 116 Clement St., S.F.]

Ruin & Rose: Screening for one night in a local premiere, the extraordinary ski film boasts breathtaking cinematography, skills of top ski talent in the industry and a story that warns against global warming. [8 p.m., Marines’ Memorial Theatre, 609 Sutter St., S.F.]

Damien Lemon: The comic, who’s been on MTV2’s “Guy Gode” and calls his act an “all-inclusive bug session,” opens a two-night stand. [8 and 10:15 p.m., Cobb’s Comedy Club, 915 Columbus Ave., S.F.]

Fortune Feimster: The lesbian comic, originally from North Carolina, tweeted after the presidential debate, “Who do you think won? More importantly, who would Beyoncé be the most proud of?” [8 and 10 p.m., Punch Line, 444 Battery St., S.F.]

The Brothers Size: Theatre Rhinoceros stages the drama by Tarell Alvin McCraney about what happens after two siblings reunite in the bayous of Louisiana and try to start afresh. [8 p.m., Eureka Theatre, 215 Jackson St., S.F.]

Seared: San Francisco Playhouse presents Theresa Rebeck’s newest play, which pits a celebrity chef against the moneybags investor who wants to shutter his restaurant. [8 p.m., 450 Post St., S.F.]

Leslie Lawrence, Brad Crenshaw: The local authors speak about their books: Lawrence’s memoir “The Death of Fred Astaire: And Other Essays from a Life Outside the Lines and Genealogies” and Crenshaw’s “Genealogies,” an “original epic poem in blank verse.” [7 p.m., Books Inc., 601 Van Ness Ave., S.F]

Huey Copeland: The art historian charts Sun Ra’s evolving importance as icon, inspiration and prophet for a range of contemporary visual practitioners in the talk, presented by the S.F. Art Institute Graduate Lecture Series. [4:30 p.m., SFAI Lecture Hall, 800 Chestnut St., S.F.]

SATURDAY, OCT. 1

3 For All: The improvisation troupe featuring Rafe Chase, Stephen Kearin and Tim Orr, which began in the Bay Area, celebrates its 20th anniversary with a one-night only local performance. [8 p.m., Marines’ Memorial Theatre, 609 Sutter St., S.F.]

Tricycle Music Fest: The San Francisco Public Library’s eighth annual concert series for kids kicks off with 2016 Parents’ Choice Gold Award winner Frances England. [3 p.m., Ortega branch, 3223 Ortega St., S.F.]

Krystle Ahmadyar: The vocalist and songwriter, whose music is rooted in Afghan and Mexican ancestral traditions, appears as part of APAture 2016, a two-week showcase of dozens of artists representing Asian Pacific American cultures. [7 p.m., Bindlestiff Studio, 185 Sixth St., S.F.]

Sticky Fingers: The Australian five-piece band calls its sound a “melting pot of psych, rock, reggae and bourbon.” [8:30 p.m,, Rickshaw Stop, 155 Fell St., S.F.]

Blake Charlton: The Bay Area fantasy author (as well as physician and “proud dyslexic”) is promoting “Spellbreaker,” which addresses the question: “What if a prophecy predicts that you will either murder someone you love — or die yourself?” [3 p.m,, Borderlands Bookstore, 866 Valencia St., S.F.]

Bay Day films: “Warning Warning,” a 1970 short created to build support for the Save the Bay movement, and “Watermark,” a documentary by Edward Burtynsky with diverse stories from around the globe about humans’ relationship with water, screen. [2 p.m., Brower Center, 2150 Allston Way, Berkeley]

Little Willie G: The soulful vocalist is best known as the voice of East Los Angeles’ Thee Midniters, one of the first Chicano bands to have a national hit in the 1960s. [8 p.m., Club Fox, 2209 Broadway, Redwood City]

Sia: The Grammy nominee and multi-platinum selling hitmaker appears on her first arena tour, “American Nostalgic For The Present,” with special guest Miguel. [7 p.m., Oracle Arena, 7000 Coliseum Way, Oakland]

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