For one weekend each June, Larimer Square becomes a giant canvas for chalk artists. Mimicking the street painting of sixteenth-century Renaissance Italy, dozens apply to the Larimer Arts Association for permission to create their masterpiece on some of Denver's highest-rent asphalt. The lucky are selected on a first-come, first-served basis; all materials are provided, and participation is free. It's also free to watch, and a stroll at dusk through this urban festival is one of the year's most perfect nights in Denver. Just don't tell anyone you're a cheap date.