What I found interesting about Union Square this place is a free civic room for publics interest. In this square unlike other public parks and squares in NY, here it is busy day and night with people selling their arts and crafts from little stalls, chess players, musicians, folk relaxing on benches, and all varieties of midtown city life. Beside the daily life in Onion Square, this place is an important and historic intersection and surrounding neighborhood, partially for political and social activism.
Union Square is place of the freedom of speech and express your interest. I want to place my object in Union Square because here is a vibrant centre of sounds. The sound we want to listen/avoid or express one.