Sam Member Store is open from 8: 00 to 22: 00. Sam Member Store is a high-end membership store owned by Wal-Mart, a Fortune 500 company. Its name is taken from Mr. sam walton, the legend of the retail industry and the founder of Wal-Mart. Sam has a history of more than 30 years since its first store opened in April in the Midwest of Oklahoma 1983.