Sometimes 17-year-old Rashad and his pals hang out at the Waffle House, trying to figure out what's next after they graduate. But on Sunday nights, they know what's coming. They'll be at the Cascade roller rink: laying down moves, chillin' with friends...and for a few hours leaving what's outside outside. ATL is a Sunday night fever of laughs, drama and crunk sounds. Video director Chris Robinson makes his feature debut,