So it looked like you were doing some 70s disco dance.

所以看起来你在跳 70 年斯科舞。

A ball is usually a party where everyone wears very nice clothes and does some sort of formal dancing – not like disco dancing or the kind of dancing you would see in dance clubs, but more formal dances.

舞会通常一个派对，每个人非常漂亮衣服，跳某种正式舞蹈——不像斯科舞或你会在舞蹈俱乐部看到那种舞蹈，而更正式舞蹈。