17TH ANNUAL DENVER UKEFEST: It’s a full day of ukulele-centered music, workshops and performances at Swallow Hill Music. Featuring artists such as Brittni Paiva, Cynthia Lin and Steven Espaniola, the event celebrates the versatility of the instrument, from 10 a.m. to 10:30 p.m. Saturday, 71 E. Yale Ave., Denver, $63.25-$102.87; swallowhillmusic.org.

THE COLORADO GUITAR SHOW & CUSTOM LUTHIER EXPO: Music gear takes center stage at this show, where attendees can buy, sell and trade guitars, basses, amps, pedals and more at Legacy Campus. The event also highlights custom builders and luthiers showcasing their craft from 10 a.m. to 4 p.m. Saturday, 10035 S. Peoria St., Lone Tree, $5-$10; guitarshowmagazine.com.

ALAN DOYLE: Celtic rock artist Alan Doyle brings his band to the Boulder Theater for a night of high-energy performances and folk-infused rock. Joined by special guests Bandits on the Run, Doyle will perform music from his solo career and from his time as the lead singer of Great Big Sea at 7 p.m. Sunday, 2032 14th St., Boulder, $47-$79; axs.com.

BRIAN POSEHN: The comedian and actor brings his sharp, nerd-leaning humor to Denver’s Comedy Works for a multi-night run in Larimer Square. Known for roles in “The Big Bang Theory” and “The Mandalorian,” Posehn will deliver stand-up that blends pop culture with personal storytelling through five shows from Thursday to Saturday, 1226 15th St., Denver, $22-$35; comedyworks.com. 

‘THE CAT AND DOG SHOW’: Core Art Space presents a juried exhibition celebrating all things feline and canine, featuring works from artists across a range of mediums, including painting, photography and sculpture. The free show explores both playful and unexpected with the opening reception from 5 to 9 p.m. Friday, on view through May 24, 6501 W. Colfax Ave., Lakewood; coreartspace.com.