Due to an injury to guitarist Gerardo Nunez, the Guitar Society of Fine Art has postponed his upcoming appearance until December. Taking his place at the scheduled 8 p.m. concert, April 5 at Synod Hall, Oakland, will be Flamencos en el Aire, a flamenco group with guitarist Ricardo Marlow, dancers Ana Menendez and Edwin Aparicio and singer Jesus Montoya. Tickets remain $30; call 412-394-3353.