A warehouse club is a large shop which sells goods at reduced prices to people who pay each year to become members of the organization that runs the shop.
warehouse club in British English
(ˈwɛəˌhaʊs klʌb)
noun
business
a large store selling at cut rates, which is open to customers who pay a membership fee
It took Costco, an American-style discount warehouse club, two years to obtain outlineplanning permission for a new store.