Bring your tie-dye shirts, platform heels and bell bottoms to a FREE outdoor concert. Boogie Machine, a groovy band playing hits from the 1970s, perform on the grounds of the Smoky Hill Library on Friday, October 2 from 5 p.m. to 7 p.m. Local food trucks will be on hand for dinner, snacks or dessert. 5430 S. Biscay Circle (northeast corner of Smoky Hill Rd., one block east of Tower Rd.), Centennial, 303-542-7279.