Monday Musical Storytime: 10:15 a.m., Boulder Public Library, 1001 Arapahoe Ave., Boulder. Get ready to dance and sing during this live storytime full of songs, musical stories and more. All ages are welcome. Children must be accompanied by an adult. calendar.boulderlibrary.org.

Rainbow Toddler Dance Party: 11:15 a.m., Boulder Public Library, 1001 Arapahoe Ave., Boulder. Dance to the colors of the rainbow during this month’s Toddler Dance Party. Come move and groove using props and having fun. Tiny feet, big colors, lots of fun. For toddlers aged 1-3 years old accompanied with a caregiver. calen dar.boulderlibrary.org.

Chess Club: 5:30 p.m., Boulder Public Library, 1001 Arapahoe Ave., Boulder. Play chess and learn with chess master Joshua Romero on second and fourth Mondays every month. Players of all abilities are welcome to drop in. Ages 8-18. Children younger than 8 are welcome with an adult helper. calendar.boulderlibrary.org.

Boulder Social’s Burger Knockout: 11 a.m. Tuesday, Boulder Social, 1600 38th St., Boulder. Join each week for Boulder Social’s Burger Knockout. Two burgers go head-to-head. Cast a vote by ordering one or the other. The winning burger will take on next week’s challenger, with a new challenger every Tuesday. This event will occur on Tuesdays through April 28. Free, 720-716-3345, eventvesta.com.

Trident Author Series: 1:30 p.m. Tuesday, Trident Cafe, 940 Pearl St., Boulder. Cecily Stone is a mother, writer, computer nerd and author of “These Chasms in the Earth.” This gripping and explosive debut book of poetry is about navigating the pitfalls of modern motherhood. Through poems that are both darkly beautiful and somehow intimately familiar, Stone reveals truths often left in the shadows as she faces an uphill climb to break family cycles. tridentcafe.com.

“The Martian Contingency” book signing: 6:30 p.m. Tuesday, Boulder Book Store, 1107 Pearl St., Boulder. Mary Robinette Kowal will speak about and sign her new book “The Martian Contingency.” $5, boulderbookstore.net.

Velvet Vinyls: 6 p.m. Wednesday, Velvet Elk Lounge, 2037 13th St., Boulder. Meet Stevie, the beloved pink-horned elk, the heart and soul of The Velvet Elk Lounge. Celebrate Stevie every Wednesday with Velvet Vinyls — an evening of live vinyl spinning and all-night happy hour specials. Enjoy great music, good company and drinks at a deal. Free, 303-993-8743.

Shelf Help Tour: 7 p.m. Wednesday, Dairy Arts Center, 2590 Walnut St., Boulder. Leaving Dublin, Ireland, where he was born and raised until the age of 22, David Nihill got drunk on travel and never quite hit sobriety of it. He has lived and worked in 12 countries and visited over 70. His shows draw on his wide travels, cultural observations, attempts at language study, (occasional) international drinking session(s) and being a mildly confused immigrant. His new show Shelf Help mixes comedy and reading recommendations because that’s the kind of wild kinky stuff he’s into. $34-$49, thedairy.org.

Editor’s note: Availability and scheduling of events may be subject to change.