CHARLES Barkley — who was arrested for drunk-driving in December after running a red light — probably shouldn’t have been tending bar at the watering hole inside the Basketball Hall of Fame in Springfield, Mass., after the reunion dinner last week. Cameras were flashing away and the NBA couldn’t have been happy. Meanwhile, sources say Michael Jordan, who drinks less than Barkley but gambles more, didn’t stay at a hotel in Springfield during the two days of festivities. Instead, Jordan went back and forth to the closest casino, the Mohegan Sun, in Uncasville, Conn.