While most Carolinians are familiar with the South Carolina state dance, the uninitiated aren’t so sure what the shag is all about and what the term “beach music” specifically means to locals. Not to be confused with surf rock, Southeastern-style beach music is a soul/pop hybrid with shag-friendly rhythms and tempos. The nonprofit Beach Music and Shag Preservation Society of S.C. knows that shag dancing is still wildly popular across the Carolinas, especially in the Charlotte area and along the Grand Strand. This week, the organization presents the sixth annual Charleston Beach Music and Shag Festival on Sun. Sept. 4 and Mon. Sept. 5 at Plan B in West Ashley. Both evenings will feature DJs, bands, workshops from Jerry and Barbara Wade, food, and beverages. The lineup on Sunday features Rhonda McDaniel and Friends, Rick Strickland Band, and DJ Mike McDaniel. Monday’s roster features DJ Gerry Scott, the Carolina Soulband, DJ Jim Bowers, Jim Quick and Coastline (pictured), and DJ Betty Brown. Nightly admission is $30 at the door ($25 for members). Two-day passes are available.