Here's an example, using NYC Mayor Bill De Blasio.  Currently, the card that people see, is a small version of the cover photo, the Space name, and the number of followers.  I'm just suggesting adding other info fields that already exist to a card that already exists.  Category, Parent Space, and other fields are already shown in blocks on the Space View page, but it would be nice to see those on the card that appears on  the various pages as well as feed notifications.  A follow button would be nice to have on the card, but for now we can call it a luxury item  Maybe a short snippet from the Description field.

Overall, just the ability to add more info to the card to give users a better idea what the space is all about.  In some applications the Space name would be sufficient, but in many cases it isn't, and that's why I'm suggesting this.