--  KansasCityMusic.com has been online since 1998. It is designed and is maintained by Mark Valentine, President of Box of Chalk, Inc and CEO of United Entertainment.
Valentine began playing professionally in 1972. He began producing concerts the following year.
Valentine has done shows with Robert Cray, Gretchen Wilson, Billy Ray Cyrus, Eddie Money, The Little River Band, The Fabulous Thunderbirds, Los Lonely Boys, Nick Lowe, The Byrds, Jackyl, Nigel Dupree, The Ozark Mountain Daredevils, Jim Dandy and Black Oak Arkansas, James Otto, Dr. Hook and The Medicine Show, Mitch Ryder, Molly Hatchet, Chris Cagle, Bo Diddly, The Impressions, Betty Wright, Bobby Lewis, Bill Haley's Comets, John Lee Hooker Jr, Billy Paul, The Brothers Osborne , David Cook , Logan Mize, Jackopierce, Freddy Jones Band, Los Lonely Boys, The Samples and others.