GRAPEVINE, Tex. — The throngs of teen and 20-something women flowed into the ballroom of the Gaylord Texan hotel on a Friday night this month in a blur of shimmer and pink. There were sequins. There were bell-bottoms. There were sequin bell-bottoms. Most opted for some form of heel — often platformed, sometimes bedazzled. Others sported go-go or cowboy boots. (Kari Lake’s daughter wore a rose gold pair of the latter.) A disco ball as wide as a bathtub hung above them, giving them a silvery twinkle as they settled in to neat rows hundreds of chairs long. “September” by Earth, Wind & Fire blasted through the sound system.