Grossen Bart Octoberfest Festival: Join us on Saturday for the release of our Friendly Mutton Chop Marzen beer at Grossen Bart Octoberfest. Order a special kid’s beer to soak up the good foam; 4 p.m. Saturday, Grossen Bart Brewery, 1025 Delaware Ave., Longmont; grossenbart.com.

Forbidden books and beers: Join a discussion on “The Absolutely True Diary of a Part-Time Indian,” by Sherman Alexie, which tells the story of Junior, an aspiring cartoonist growing up on the Spokane Indian Reservation. Email [email protected] or [email protected] to let them know you’re coming; 3 p.m. Saturday, Big Thompson Brewery, 114 E. 15th St., Loveland; Free; bit.ly/3TDFfdo.

Niwot Lobster Festival: Start the evening with a Sea Breeze welcome cocktail, then enjoy lobster, potatoes, corn, baked beans, rolls, cookies and ice cream at Whistlestop Park. For the kids, there’s lobster mac and cheese, sides, and a fun toy. Beer, wine and soft drinks will be on sale. There will be live music from House Blend Band and Tim Stiles, a silent auction to benefit the victims of Marshall Fire and more; 4 p.m. Saturday, Whistlestop Park, 61 2nd Ave., Niwot; bit.ly/3AJufTe.

Music at McIntosh Lake: Listen to live tunes from the Five Seasons Wind Quintet during this free outdoor lawn concert. Bring a picnic and your own chair or lawn blanket; 6 p.m. Saturday, Flanders Park, 2115 N. Shire Drive, Longmont; Free; 303-981-2940; visitlongmont.org.

Coming

Jonathan Foster Music in Lyon: Hear American folk songwriter Jonathan Foster play a solo set that will bring his rootsy acoustic and harmonica-tinged tunes to Lyon; 10 a.m. Sunday, The Stone Cup, 442 High St., Lyon; jfmusic.net.

Uke Jam at Bootstap: Whether you want to learn to play the ukulele or you already do and want to have fun, wipe down your uke and join it. Host Brian Rezac has extras you can borrow. Or, just come enjoy a beer and watch. All ages and levels welcome; 2 p.m. Sunday, Bootstrap Brewing Company, 142 Pratt St., Longmont; bootstrapbrewing.com.

Duo Laurie & Lorrie at the Gold Hill Inn: Enjoy a six-course dinner or simply relax in the beautiful courtyard of the historic Gold Hill Inn. Laurie & Lorrie cover just about every genre and will perform on the historic stage; 5 p.m. Sunday, Gold Hill Inn, 401 Main St., Boulder; Free; lauriedameron.com.