The Big Swing’n Band Club presents, for your listening and dancing pleasure, the Gainesville Swing Orchestra on Wednesday, Aug. 23. Doors open at 6:30 p.m., and dancing is from 7 to 9 p.m. at the air-conditioned Robson Ranch clubhouse ballroom. The Gainesville Swing Orchestra is a 20-piece “Big Band” with singers, trumpets, trombones, saxophones, and…