(SHELBYVILLE) Macon, Music & Mules is creating toe-tapp'n fun every day through Sunday. It's at the Cooper Steel Arena at the Walking Horse Showgrounds in neighboring Shelbyville (721 Whitthorne St.). This family-friendly event opens each morning at 8:00 o'clock and continues into the evening, plus--the Cowboy Church will be held there at 11:00 o'clock Sunday morning. WGNS' Bart Walker hopped on a mule train and met Gloria Christy at Macon, Music & Mules . . .