The function of のに is to express the contraindicatory nature of the action in relation to the situation.
It is a colloquial manner of speaking, so try to phrase the translation in a way that reflects the "flavor" and emotion of the original if you can.
Thanks for your help!
When I post here, I usually give translations as literally as possible, so that my way of thinking is clear. Although I must admit that my translations don't get much "flavor" in my head either. In general I am only interested in understanding the grammar and the meaning of the sentence. These are my top priorities when reading. I want to understand the "flavor" as well, but that can stay in japanese, I'm not trying to convert it to english.
You are normally allowed to miss practices when you are NOT getting close to the actual performanceI had a feeling it was like this...but I don't see the logic. Shouldn't the sentence after 窶堙娯?堙 be contradictory? I mean, doesn't "even though the performance is close, missing is not allowed!" give the feeling that you are normally allowed to miss practices when you are getting close to the actual performance?
"even though the performance is close, you miss practices" is not allowed = "when the performance is NOT close, you miss practices" is allowed = You are normally allowed to miss practices when you are NOT getting close to the actual performance
I hope you cen see where you misunderstood...
In fact, a resultative conunction 本番も近いんだからズル休みなんてダメだよ "because the performance is close, you are not allowed to miss practices" can convey almost the same meaning. In this case, ズル休みなんてダメだよ is a set.