Conversation so far:
What was your favorite thing you read aboutBillie Jean King and gender equality?
When the open era began, Billie Jean King campaigned for equal prize money in the men's and women's games.
How did Billie Jean King affect equality?
Billie Jean King is an advocate for gender equality and has long been a pioneer for equality and social justice.

Question: Did many women play the sport at the time?
Self-contained rewrite: Did many women play the sport at the time of Billie Jean King?