That's so sick! I feel like you'd appreciate the documentary on Netflix called What We Started. There's a fascinating book I read about all this called "Generation Ecstasy". That guy goes into incredible detail.
https://www.amazon.com/Generation-Ecstasy-World-Techno-Culture/dp/0415923735
Seems to me like you mostly answered your own question in the second sentence.
Having said that, raving didn't start in earnest until the meeting of house and ecstasy happened in the late 80's. The watershed moment was the Second Summer of Love in 1988 which happened in UK but it's reverberations were felt across Europe.
Playing house means house in the broadest sense of the genre: everything from acid house, piano house, club house, deep house, Detroit techno and garage house , early hardcore techno, early trance, perhaps even disco related stuff like new beat and high energy. The hardcore and pre-hardcore divide is a very UK point of view to approach this question by the way. Mainland Europe (Germany, Netherlands, Belgium etc.) raving has a stronger unbroken four-to-the-floor lineage. It's not that UK hardcore, didn't happen (in fact it was massively influential) there, but the hardcore rave moment was more defined by Parkzicht sound, PCP label and R&S to name only a few important names from rave's formative years.
..and before house it was all kinds of pop/disco music, but that was a different beast in a sense. One could argue effectively there's a disco continuum where music and industry (discotheques, dj's, record labels etc) that seamlessly shifted from pop/disco to house music for the newer generation of dancers.
If you want to read up on the subject this book might be a good start.
I haven’t read them , some of my friends did Nd they highly recommend these 2
Generation Ecstasy: Into the World of Techno and Rave Culture https://www.amazon.com/dp/0415923735/ref=cm_sw_r_cp_api_i_W6G74VHTM6S0MNGW5KJQ
Last Night a DJ Saved My Life: The History of the Disc Jockey https://www.amazon.com/dp/0802146104/ref=cm_sw_r_cp_api_i_PX3VCGEM9HBWXD8CRJ4Y?_encoding=UTF8&psc=1
Hope you find what you are looking for there or at least they help you as starting point.
I would also check YouTube, there has to be some documentaries there as well.
Try Generation Ecstasy. Possibly a bit misinformed, but a good read nonetheless.