Sam's Club, a popular members-only warehouse with approximately 600 locations in the U.S. and Puerto Rico, has been criticized by Reddit users for its cleanliness and general hygiene. One Redditor claimed that the preparation food area was not up to standard and that black mold was everywhere. Other employees claimed to have reported issues to management multiple times but nothing was changed. However, it appears that the cleanliness of Sam's kitchen may be based on location. The most popular pre-made meals are made in-house in the HMS kitchen.