There was more eclecticism to things like Megatripolis and Megadog than maybe there appears to be in retrospect.
Megatripolis was not bad for a mid week club night in central London. The talks in the room upstairs included mad hippie shit that Luka likes (McKenna, Ruper Sheldrake, that bloke that wrote the book about MDMA) but also Class War (in a "spikey vs fluffy" debate iirc) and Stewart Home. There were stalls selling literature that included druggie nonsense but also the counter culture of the time - opposition to the Criminal Justice Bill being a big thing.
Musically, Mixmaster Morris was a fixture, but Weatherall and Colins Faver and Dale also played.
Megadog has your awful trance but also more credible sets from Aphex Twin, Orbital, PWOG and others.
Basically both these things brought together home counties kids who would probably have been into indie otherwise. So they acted as gateway drugs to other things - some people embraced Banco De Gaia and Infected Mushroom but others dug deeper.
The weird hippy trappings were just as present in things like Spiral Tribe - just not in the music.
I'd say spiral tribe got pretty dull for the most part after 94. There were some great spiral adjacent things though, unit moebious the whole bad trip forever and ever den haag acid scene. Which was very much indebted to the ungodly hybrid of italo cheese and dark as fuck minimal wave, long before that became a trend for the hoxton massif.