To Add a Team to the Club Chat:
Start in any team that is part of the club.
Navigate to Settings > Connections > click on the club name.
Below the list of teams, click the arrow beside Show teams you manage.*
Click Add to club next to the teams you want to include in the chat.
To Remove a Team from the Club:
Go into a team within the club where you are admin.
Access the club the same way as outlined above.
Scroll down to the listed teams and click the arrow to the right of the team name.
Press the three dots in the top-right corner.
Select Remove team from club.
* If you don't manage the team you want to add, just scroll down to the invite to club link at the bottom of the page. Share this link with the team's admin and they can use it to join the club.