Ключевые слова: assembly, attendees, attentive, audience, auditorium, back view, business meeting, communication, conference, convention, corporate, crowd, development, dialogue, discussion, diverse, education, event, focus, forum, gathering, group, information, instruction, interactive, large venue, learning, lecture, lecture hall, listening, mass, meeting, networking, participants, people, presentation, professional, public speaking, seminar, session, speakers, summit, symposium, trade show, training, workshop,