Spanish-speaking world --- Not just in Latin America but in Spain as well it is customary to recognize the presence and address all important personalities in the room. It can lead to reeeaaallly long introductions (2-3 minutes). Although if someone is left out usually doesn't have serious consequences (or his/her aides warn the speaker and he/she can mentioned the person left out, at the end of the speech).

Source author: Adrienn Nasz adrienn.nasz@gmail.com