Ключевые слова: arena, audience, auditorium, background, black, business, business meeting, chair, chairs, chairs back, cinema, concert, conference, corporate, education concept, empty, entertainment, europe, event, festival, group chairs, have a seat, horizontal, interior, learn, lecture, lines, many, meeting, modern, movie, music concert, nobody, open air, outdoor, outside, plastic, presentation, public, red, row, scene, seat, seating, seats, show, stadium, theater, theatre, work,