Sundy Best (pictured) headlines Friday’s Live on the Levee free concert series at Haddad Riverfront Park. Union Sound Treaty kicks off the evening of music at 6:30 p.m., with Sundy Best taking the stage at 7:30 p.m. Sundy Best re-imagines timeless classic rock of the ’70s and ’80s — think the Eagles and the whiskey-voiced lyrics of Tom Petty and Bob Seger. Union Sound Treaty, based out of Morgantown, is a quartet that a reviewer for “Saving Country Music” summed up this way: “These guys have a bead on what really resonates in country music with listeners.” Domestic beer and wine will sold and multiple food vendors will be on hand. There will be a 50 / 50 raffle drawn at 8:15 p.m. to help raise money for Charleston-area charities. For information, visit liveontheleveecharleston.com.