There is no minimum number of players to create a club. If you decide to create a club, you need to click on the Create Club button, which is located at the bottom of the window, which displays all existing clubs. You will be the first member and leader of this club and you will be able to invite other players by using a link invitation or by inviting players via the Invite to Club button visible in their profiles. Only players who are not yet club members will have a similar button in their account. The maximum number of club members is 30 people.