I just added a page to RewardsDB that lists lounges by country and city that allow non-standard access (ie access other than via club annual+ membership, F/C flight, or FF Elite) including Priority Pass, Diners Club, Amex, Lounge Pass, and Paid Day passes.

http://rewardsdb.com/lounge1.php

Hope people find it useful - I was surprised at how many lounges Diners has in some parts of the world when I actually analyzed it.