In addition to the T1 - D Concourse lounge, they also have a Club LAS in the new T3:
http://www.theclubairportlounges.com/theclub-at-LAS.php
If one doesn't have PP, a day pass is available for $35. There's a $10 off voucher available on their website, but it can only be used in the T1 club, not at the T3 club:
http://www.theclubairportlounges.com...l-offer-10.php