Thank you very much to all those people who took the time to watch the dance the other day.
ご質問ありがとうございます。
「先日の[ダンス](https://eikaiwa.dmm.com/uknow/questions/56286/)を見に来てくれた人ありがとう」は英語で「Thank you very much to all those people who took the time to watch the dance the other day.」という風に言えます。
ご参考になれば幸いです。