[误] The students are going to a dance party on Saturday night.

[正] The students are going to a dance on Saturday night.

注：舞会应该说 dancing party，不要说 dance party，但一般只说 dance 也就够了。开舞会就说 give a dance，去参加舞会就说 go to a dance。那旅馆每晚举行舞会：At the hotel dances are held nightly. 我第一次遇见她是在一个舞会上：She and I first met at a dance. 他们请我参加舞会：They asked me to a dance. 规模较大的舞会，英语又可说 ball，是从拉丁文来的。