Basic idea is to have the community all play the same game and then talk about it and our experiences.
I feel the games should be either very inexpensive or free. Even a demo or "Prologue" would be an easy way to make it free. In regards to selecting games we could use community engagement and vote in some fashion, or have a pool of games which everybody contributes to and one is selected at random.
This is just a random idea I had but wanted to throw it out there.
Fan of the idea, thought of something like this for a couple of friends I have on Discord, and it is both fun and valuable, since the suggestions come in a more natural, discussion-like manner between a circle of passionate people, instead of the algorithmic approach of Steam and critic aggregates. Please do such a community and let's get this started!