Originally Posted by number_6

The requirement to show a valid ticket would seem to rule out access to most lounges; you would have to have a paper ticket, or an e-ticket that includes a sector on the airline whose lounge you are trying to access (otherwise the computers at the lounge won't see the ticket). If AY really wanted you to have lounge access, then the boarding pass would be all that is required. Adding the ticket requirement effectively removes the benefit; an interesting way to do business.