Budo Reigi in THSYR
by Takamura Yukiyoshi is by far the best exposition of this topic I have read. Maybe there is something out of sado or shodo, but those aren't really my purview.
Funny story/Cautionary tale: In a Japanese language class one day our teacher had us sit in seiza with him so we could get an "idea" of a formal visit to someone's home. He sort of judged who was suffering the most asked them a question about summer vacation and then gave them the magic words "Oraku ni nasatte kudasai." The thing is, a couple of my classmates refused. It was funny because it vexed him a bit and I'm sure that whatever else they did they got a failing grade for that day. But more seriously, none of those classmates lasted through the term and these were not beginning students; each had invested at least 2+ years of study already.
I think you will notice if you look that the quality of the reigi before a performance or enbu of any kind is indicative of the quality of the rest.