body: I'm thinking of:
  
  
  * BJ's Wholesale
  * Sams Club
  * Costco
  
  
  Does a member/club relationship legally confer some business advantages?
  
  
  Is it true that that they are not public access stores, because you must be a current member and you have to show credentials at the entry point?
  
  
  Could a club deny particular services (even to a member) that an ordinary business may not?
  
  
  
title: US: What is the purpose of "club" in retail outlets