The upper-class people who turn up at horseracing events, particularly Royal Ascot, have also often been cited as Hoorah Henries.
ðɪ ˌʌpɚklˈæs pˈiːpəl hˌuː tˈɜːn ˌʌp æt hˈɔːɹsɹeɪsɪŋ ᵻvˈɛnts, pɚtˈɪkjʊlɚli ɹˈɔɪəl ɐskˈɑːt, hæv ˈɔːlsoʊ ˈɔfən bˌɪn sˈaɪɾᵻd æz hˈoːɹə hˈɛnɹiz.