Find a seat, spark up a conversation with some of the locals and enjoy the hustle and bustle of Gabriel Narutowicz Square. It's a lovely spot to take a break from sightseeing.
When you've finished at this modern public area in Centrum, why not make your way to Old Town Square, Royal Castle, and Lazienki Park? They're not very far from Gabriel Narutowicz Square and also a favorite with tourists.