It's about putting on faces to act like they fit in with the lifestyle of people that go to country clubs and play tennis (typical WASPy rich people), but in actuality, they're masking their emotions with joyful faces - "we're so happy, even when we're smiling out of fear" in order to promote the idea that their day-to-day is something to be admired and desired, i.e., pretending to be have direction and purpose in their ritzy lives, but in reality, they have no idea what the fuck they're doing.
It's about putting on faces to act like they fit in with the lifestyle of people that go to country clubs and play tennis (typical WASPy rich people), but in actuality, they're masking their emotions with joyful faces - "we're so happy, even when we're smiling out of fear" in order to promote the idea that their day-to-day is something to be admired and desired, i.e., pretending to be have direction and purpose in their ritzy lives, but in reality, they have no idea what the fuck they're doing.