Every four years, it's time for people around the world to tune into the World Cup. Since sports are usually a safe small talk topic, the matches might give you a good opportunity to make some small talk with your business partners.
But if you make small talk about the World Cup games with business partners from the U.S. or U.K., it might be good to avoid using the phrase "public viewing".
In English, "public viewing" generally means öffentliche Aufbahrung. To avoid any confusion, use "public screening" instead.