Ключевые слова: adult, attention, audience, auditorium, backs, blur, business, coaching, competitive advantage edge, competitor, conference, congress, crowd, dicsussion, event, female, foreground, forum, group, information, knowledge, learn, lecture, listeners, male, man, many, meeting, men, participants, people, person, presentation, profit margin, public, rear, rival, room, round table, row, seated, seminar, sit, speaker, training, watching, woman,