A GATHERING OF SONEROS AT THE 9TH ANNUAL FESTIVAL CUBANO   VOCALISTS AND BANDLEADERS OSCAR D’LEÓN, ADALBERTO ALVAREZ AND GILBERTO SANTA ROSA TO HEADLINE THE THREE-DAY EVENT, AUGUST 10-12 AT RIIS PARK   WBMX-FM 104.3 PERSONALITY JULIAN JUMPIN’ PÉREZ GETS…