Cola’s biggest Mardi Gras celebration is back — and bigger than ever — bringing a full day of live music, food, and fun to City Roots on Saturday, Feb. 14 (Valentine’s Day), from 12 to 7 p.m. The 16th annual Mardi Gras Columbia festival, hosted by Krewe de Columbi-Ya-Ya, will feature a record-setting 19 local bands performing across three stages, marking the largest lineup in the event’s history. E.Z. Shakes, 48 Fables, and Dylan Hayes Band will headline the bill…