From the PP website:
Your Membership entitles you the benefits of special Dining Discounts on the total food bill when dining at participating restaurants. In this pack you will also find a Complimentary Breakfast for Two Certificate.
Member and one (1) guest 50%
Member and two (2) guests 33%
Member and three (3) guests 25%
Member and four (4) guests 20%
And so on, until
Member and nine (9) guests or more 10%
Member dining alone 25%
I always use my PP card when dining at breakfast with 1 or 2 guests but have never used it when dining alone.