You can get them through the following ways:

• Chests can contain club cards. Purchase chests by using diamonds in the store.
• Complete quests and open Pin chests.
• Win matches in regular/tournament/arena mode to get chests as rewards.
• Get chests from daily deals.
• You can also purchase club cards directly in daily deals. 
• Join activities on our page to get free chests as rewards! Follow us to be notified of any activities: https://www.facebook.com/GolfRivalGame/