A girl dances at passengers lobby during the Floor Improv Day at Union Station in Los Angeles, the United States, on June 24, 2018. Union Station provided dance lessons, live bands and open dance floor for the commuters on the Floor Improv Day. (Xinhua/Zhao Hanrong)

People dance at passengers lobby during the Floor Improv Day at Union Station in Los Angeles, the United States, on June 24, 2018. Union Station provided dance lessons, live bands and open dance floor for the commuters on the Floor Improv Day. (Xinhua/Zhao Hanrong)