We use Matrix to organise our day-to-day activities in the club. It's similar to Discord, but it's open source, self hosted and federated.
The invite link is https://glasgow.social/matrix
There is a dedicated room on the glasgow.social homeserver for The Gamer Club (as well as a member only room that you should be auto invited to on joining).
We also have rooms for Board Games, D&D, Tech, Movies etc
Joining the overall Glasgow Space will let you browse all the rooms in one place.