The regular Costco members can still shop at a business center but the merchandise is not targeted towards them.

The business centers sell things like cases of cups, plates, disposable silverware, legs, shoulders and other large cuts of meat, cases of common restaurant ingredients, salt and pepper shakers in bulk for tables etc.

We go to the business center by us every so often because they carry real American cheese in bulk, not the Kraft garbage the regular Costco has.