This is the accepted form of addressing a crowd of people in English. It's counterparts in German, French and Spanish are respectively "Meine Damen und Herren", Mesdames et Messieurs" and "Senoras y Senores" all pretty direct translations.
In Irish, fair enough, the equivalent is "A dhaoine uaisle" (not a direct translation and no reference to different sexes.)
So....
Please somebody tell me that
this announcement is a joke!