Saturday Sing-Along: The Beatles
An intergenerational gathering for songs and stories is planned, with all ages welcome. Sponsored by the Boulder Library Foundation; 3 p.m., George Reynolds Branch Library, 3295 Table Mesa Drive, Boulder; free; 303-441-3100, boulderlibrary.org.
Historical Museum Open — Superior Historical Commission volunteers staff the Superior Historical Museum on the first Saturday of each month from 10 a.m.-2 p.m. Come by and learn about the rich history of the community; 10 a.m., 110 Maple St., Superior; superiorcolorado.gov.
Colorado Music Festival: Young People's Concert — Introduce young children to the excitement of live orchestra music with a program that engages audience members young and old. After each concert, join a Music Fair where kids meet costumed characters, try the instrument petting zoo, enjoy face painting, balloon tying and more; 2 p.m., Chautauqua Auditorium, 900 Baseline Road, Boulder; $5-$10; 303-665-0599, coloradomusicfestival.org/concert/young-peoples-concert-2.
Boulder Comedy Show — The Boulder Comedy Show is the longest running comedy show in Boulder history. The shows run every Sunday at 7 and 9:15 p.m. The comedians have been featured on the Tonight Show, Late Show, Comedy Central, HBO, VICE and Showtime. There are only 100 seats available for each show. The Bohemian Biergarten features traditional German and Czech cuisine with a huge variety of imported European biers; 7 p.m., Bohemian Biergarten, 2017 13th St., Boulder; $5; 720-767-2863, BoulderComedyShow.com.
Espresso! Gypsy Jazz — Espresso! includes an abundance of Colorado talent, including Bill Pontarelli on clarinet, Jordan Ramsey on mandolin, Alexios Anest on lead guitar, Emily Reynolds on rhythm guitar, and Duane Webster on bass. They have played this music for years and are keeping the tradition of American swing music and Gypsy jazz alive; 9:30 a.m. Sunday, Spruce Confections, 767 Pearl St., Boulder; free; 303-875-7514.
Colorado Music Festival: Four Seasons of Buenos Aires — Superstar violinist Philippe Quint makes his Festival debut for a thrilling concert that includes Bartók's Romanian Folk Dances, The Four Seasons of Buenos Aires by the late, great Argentinean "new tango" composer Astor Piazzolla, and Maestro Danzmayr leads the orchestra in Franz Schubert's beautiful Symphony No. 3; 7:30 p.m. Sunday, Chautauqua Auditorium, 900 Baseline Road, Boulder; $14-$55; 303-665-0599, coloradomusicfestival.org/concert/four-seasons-of-buenos-aires.
Todd Snider — Todd Daniel Snider is an American singer-songwriter with a musical style that combines Americana, alt-country, and folk. He will perform at Fox Theatre in an all-ages show; 7:30 p.m. Sunday, The Fox Theatre, 1135 13th St., Boulder; $30-$35; foxtheatre.com/event/1702992-todd-snider-boulder.
Cowboy Junkies — The Cowboy Junkies plane a show for ages 15-plus without a parent; 8 p.m. Sunday, Boulder Theater, 2032 14th St., Boulder; $25; bouldertheater.com/event/1685399-evening-cowboy-junkies-boulder.
"Then and Now" exhibit — "Then and Now" pairs early 20th century photographs of 15 iconic Boulder locations with their 2007 counterparts; 8 a.m. Monday, West Senior Center, 909 Arapahoe Road, Boulder; free; 303-441-3148.
An Evening with reporter Michael Isikoff — Michael Isikoff will discuss his latest book, "Russian Roulette," an account of how American democracy was hacked by Moscow. Isikoff continues his investigation and will share his insights during a special fundraiser for the Democratic Women of Boulder County; 6:30 p.m. Monday, Boulder Elks Lodge, 3975 28 St., Boulder; $55.
Bandshell Boogie — Bandshell Boogie 2018 is a free outdoor summer dance series bringing dance back to the public realm; 7 p.m. Monday, Boulder Bandshell, 1212 Canyon Blvd., Boulder; free; bandshellboogie.com.