Which is the World's largest chess club? Most chess clubs in my area struggle to gather more than 30 federated members with only one club past the 100-member count in a territory of 8 million people.

Which is the largest physical chess club in the World and how many members does it have?
Marseille Échecs (831 members)

According to the French Chess Federation, Marseille Échecs is the largest French club, totaling 831 officially registered players.

Two other French clubs have more than 500 members, in the cities of Bois-Colombes (612) and Villepinte (584), both near Paris.