Ключевые слова: assembly, attendee, attention, audience, back, blurred, business, businessman, chairs, conference, convention, corporate, crowd, discussion, event, focused, formal, forum, gathering, group, hall, indoor, leadership, lecture, lecture hall, light, listening, man, manager, meeting, participants, people, person, presentation, professional, projector, rear, room, screen, seminar, sitting, speaker, speech, stage, suit, training, view, watch,