Ключевые слова: attendee, attendees, attentive, attire, audience, backlight, bright, business, businessmen, businesswomen, conference, corporate, engaged, event, focus, focused, formal, gathering, group, hall, indoor, lecture, listening, meeting, people, podium, presentation, professional, rear, rows, seated, seminar, shadows, silhouettes, sitting, speaker, spotlight, stage, suits, trench, view, wear,