Irrespective of the clubs size, it should operate a simple but secure database of its member's details. This information should be regularly tested to ensure it is secure and that the member's private information is not at risk.
By collecting member information the club can base decisions on demographics, participation rates and many other criteria dependant on what is being collected. Attaching online, automated payments and updating of member details will increase the value and integrity of this information.
When collecting information from members either online or via methods that are more traditional like registration forms the club should ensure that it is providing enough information to the members for them to understand what the club intends to do with the data and how it is stored.