Ravin’Wolf Duo at the Boulder Farmer’s Market: 10 a.m. Saturday, Boulder Farmer’s Market, 13th & Canyon Blvd., Boulder. Support local family farms at the Boulder Farmer’s Market alongside the acoustic musings of Ravin’Wolf the eclectic, grateful, folk and rock blue duo. Free, 303-910-2236, ravinwolf.com.

Niwot Honey Bee Harvest Festival: 10 a.m. Saturday, Niwot Grange Hall and 2nd Ave. downtown, 195 Second Ave., Niwot. The fourth annual Niwot Honey Bee Harvest Festival in downtown Niwot features educational lectures, live music, 60 vendors, kid’s activities, such as bee crafts, a pollinator puppet show, face painting and more. Come see the Open Studios Pollinator Art Show, test your knowledge at the Bee Trivia Contest and enjoy mead tasting from regional meaderies. Free, 720-378-1217, niwot.com.

Dave Corbus Quartet at Full Cycle Café: 6:30 p.m. Saturday, Full Cycle Café & Bar, 2355 30th St., Boulder. The Dave Corbus Quartet will explore the heart of the blues from the Delta to Ornette, from Mali to Hendrix and Miles and beyond. The quartet includes Dave Corbus, Stafford Hunter, Harold Summey and Gabe Rube. $20-$25, fullcyclecafebar.com.

Creative Whispers of the Heart art exhibit: 7 a.m. Sunday, OZO Coffee Company, 1521 Pearl St., Boulder. Stop by OZO Coffee Company to view the vibrant abstract alcohol ink artwork created by local artist Debra Jason with Creative Whispers of the Heart. Free, 303-443-1942.

“Sustainability of the Forgotten” book discussion: 2:30 p.m. Sunday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. Gary Machlis, Professor of Environmental Sustainability at Clemson University, will discuss his new book “Sustainability for the Forgotten: Bringing the oft forgotten into the core of the sustainability movement.” The book has been described as incendiary as it confronts the history, policies and practices of sustainability. With examples that range from the coffeelands of El Salvador to the coal country of American Appalachia, from the streets of Detroit to refugee camps in Greece and the upscale metro centers of the affluent, sustainability is examined with a critical eye and an emphasis on insuring that the forgotten are heard. calendar.boulderlibrary.org.

Game Gathering: 3 p.m. Sunday, Meadows Branch Library, 4800 Baseline Road, Boulder. Learn about the benefits of gaming while playing compete in tabletop games with fellow community members. Volunteers will help guide participants through a variety of board and card games. Snacks and drinks provided. For all ages. Registration required. calendar.boulderlibrary.org.

Beyond Comprehension at BOCO Cider: 4 p.m. Sunday, BOCO Cider, 1501 Lee Hill Drive, Unit 14, Boulder. Richard Shine is a master guitarist, harmonicist, vocalist and songwriter. Together with Steve Scheidker, who adds guitar and tight vocal harmonies, they are Beyond Comprehension, performing classic rock, oldies, blues and country to the delight of audiences throughout the Denver metro area. Free, 720-938-7285, bococider.com.