klubem

In a sentence

• Chodzę do klubu co piątek.

  I go to the club every Friday.

  Here, 'klubu' is used to denote a physical location or venue that is a club.

• Jesteśmy dumni z naszego klubu sportowego.

  We are proud of our sports club.

  In this instance, 'klubu' refers to the organization or group that forms the sports club.

• Dyskutujemy nad nowym klubem literackim.

  We are discussing the new literary club.

  Here, 'klubem' is used in the instrumental case to describe the literary club being the subject of discussion.