I think you have to use the internet one not the app.... Haven't tried it myself yet
How do I mute/silence/turn off notifications for clubs?

It's hard to find... but it is there on the club page. Look for "setting" and then you can choose which notifications you want to receive.
I went to settings > notifications and at the bottom it says changing notifications for clubs must be done in the "my clubs" page. But when I went to "my clubs" I can't find the means or tools to silence their notifications.
Anyone know?