A Wild Card Club, as a concept, could be a group or community that embodies the spirit of unpredictability, creativity, and innovation. The usefulness of such a club could be:

1. Encouraging out-of-the-box thinking and idea generation.
2. Fostering a supportive environment for creative expression and experimentation.
3. Providing a platform for networking and collaboration among diverse individuals.
4. Hosting events, workshops, and activities that promote learning and skill-sharing.
5. Creating a safe space for taking risks and exploring unconventional ideas.
6. Inspiring members to challenge conventional norms and push boundaries.