Koelbel Library celebrates the golden anniversary of Arapahoe Libraries on Saturday, April 2 from 1 p.m. to 4 p.m. with an afternoon of family fun. Enjoy a performance by Park Hill Brass from 1 p.m. to 2 p.m., teen retro video games, a “Barkday” party for little kids at 1:15 p.m. and 2:15 p.m. and some 60s dance moves with Miller’s Dance Studio Inc. at 3 p.m. For more details on other anniversary events, visit the Celebrate 50 Years page. 5955 S. Holly St., Centennial.