Ключевые слова: audience, auditorium, background, blue, briefing, business, campus, chair, class, classroom, coaching, college, communication, company, conference, conference room, congress, convention, corporate, discussion, education, empty, event, executive, furniture, hall, indoor, inside, interior, learning, lecture, meeting, modern, nobody, office, presentation, professional, room, row, seat, seating, seminar, theater, university, work, workplace,