From the Clubster desktop app on your computer, log into your Clubster account, click on My Clubs tab, click on Manage Membership next to the club’s name.  For Groups, click on My Groups tab, click on Manage Membership next to the group name.

From the Clubster mobile app, log into your Clubster account, from the Home screen, tap on your Profile at the bottom., tap on the 3-dots on top right, tap on Manage Memberships, tap on the club’s or group name.

You can turn on and off both Email and Mobile Push Notifications by club and by group.