I've never been naked in a locker room. Growing up, no one EVER took a shower after gym. Staff didn't even turn the showers on unless we'd just gone running, and then most girls just took a sponge bath.
I don't go to the gym regularly anymore, but my after-shower routine isn't conducive to showering and getting ready at the gym. I don't take long in the shower itself, but I have dry skin and have to put lotion or cream on after every shower or bath or my skin gets itchy and tight. I like to make sure it's completely soaked in before getting dressed, so I put my contacts in, wash my face, etc. naked after my shower. I don't like to feel rushed
Really, when I was going to the gym regularly, I don't recall seeing many naked women in the locker room. Maybe because of where I live - lots of hang ups about nudity and sex here.