Justice is one of the most sensitive issues in this tourist-friendly North African country of 32 million, where there is widespread distrust of a court system that most Moroccans believe serves the highest bidder.
Critics say verdicts in civil trials can be bought for just $5,000, while a phone call from a high official is enough to seal a guilty verdict in the case of terrorism or political trials.
The Islamist Justice and Development Party that won last year's elections made battling corruption and creating a truly independent judiciary a main plank of its campaign, but judges say little has changed.
"This issue concerns all the Moroccan people who deserve a truly independent judiciary," said Mohammed Anbar, the vice president of the club and a Supreme Court judge. "We are here, simply put, for the independence of the justice system. We want a justice system which is effective, has integrity, is strong and is independent."