This happens often. Sometimes artists draw pictures, other times people will write political messages. This sort of non-permanant expression is reminicent of De La Vega who became popular for his writings around Union Square and the Village.
EntertainmentMany people use this public space to express themselves and lots of people watch.
This is the Green Market.
Lots of people sell books in Union Square, I found an author selling his book.
These sculptures were installed in Union Square for about a day. They attracted many people which made the park even more crowded.
People sell and wear many types of shirts in Union Square. Here are a few examples.
This is a screening of Revolution: Why it's necessary, why it's possible and what it's all about.