For sports clubs and associations, the business type you should sign up as will depend on whether you are registered as a type of legal entity or not. If you are registered as a limited company or charity you should sign up as this.
If you are registered as a Community Amateur Sports Club (CASC) you should select this option.
If your club does not fall in either of these categories though, you should sign up to GoCardless as an unregistered club or society. You can select this particular option within the Company Verification settings area of your dashboard as follows.