It's not a beauty pageant, but it is similar in one sense: beauty contestants and professional models and dancers need to care for their bodies meticulously, maintaining the physique and physical condition their job demands.
So do professional athletes.
I wish I could find it, I think it was @Shaw66 who wrote a really cool post about sitting in a section at an NBA game that he realized was full of the wives and girlfriends and "road wives" of the players, and having the epiphany that one thing these ladies had in common with the players was the need for meticulous, almost obsessive, focus on their bodies.