I was checking the definition of 堂 in my online dictionary (大辞林) when I came across the word 礼楽 in:
堂 → 客に接したり，礼楽を行なったりする所。== Hall → a place where you can interact with customers and perform ritual music.
Other definitions of 礼楽 are "etiquette and music" (super vague imho), "religion" and "ceremony"
Of all these, ritual music makes the most sense to me me (judging by the kanji). Is that correct? Am I missing something? Can you provide some example sentences for clarification?