Seen a great idea in your local pub quiz? Looking for advice on how to run your own one? Use this forum to discuss anything to do with setting and running quizzes.
Twitter is useless, have tried that too. Have you tried reddit? Depending on your quiz topic there are groups on there. There’s a quiz section, but it’s not huge. If you are geared towards a certain audience, eg you’ve written a music quiz, there are music groups etc. Forums are also good, if you have a specific audience in mind.