It’s time again to grab your oyster knives. This year’s roast benefits Louie’s Kids, a nonprofit that combats childhood obesity through education and awareness. While raising money for a good cause in the Lowcountry, enjoy dozens of local oysters, beer and wine, and live music from The Depressions of Nashville, Tennessee. Visitors Center Bus Shed, 36 John St. Saturday, 7-11pm. $35, $25 advance. TK, www.charitablesocietyofcharleston.org