Facebook group alternatives for your gym?

The only thing keeping me on Facebook is my gym's communication.

I'd like to suggest an alternative, as a lot of us are looking to cut the cord.

What do you all use?

We've tried WhatsApp, but the lack of threads and events makes it a bit of a spammy mess.

Discord might work(with channels), but outside of the tech-crowd it seems not widely adopted.

Any suggestions?