I started SCing regularly in 2000 when I moved to Dallas - back then Dallas was pretty-much as it is now, a good # of pretty-good clubs but mostly just decent 2-way-contact dances - there might have been an outlier club or two where extras were common but I was not a hardcore SCer back then so if such clubs existed in the 2000s in Dallas they were not on my radar at the time nor were extras something I was looking for at the time.
I relocated back-home to Miami end of 2009 and re-started some SCing in Miami in 2011 - then joined TUSCL in early-2012 - I was not an extras-guy nor was really interested and thought the Champagne Room was just a con to rip you off out of big $$$ - it wasn't till I started reading TUSCL regularly and reading the consistent accounts of others, that I became convinced extras were indeed available in certain clubs/areas.
Pre-2000s I only SCed a handful of times in the 90s while living in South FL - per my limited experience at the time it was hard enough to just get consistent mileage/touching dances, seemed kinda hit or miss - extras were nowhere on my radar in the 90s in South FL - IDK if it was mostly me being a very infrequent SCer, or extras not being widely available (I assume a bit of both but seemed most SoFlo clubs were kinda on the tame-side vs extras-side); also the internet not being widely used in the 90s probably did not enable me to research clubs like we can today, but still back in the 90s SCing is something I did once in a blue moon thus I likely would've not had that much of a desire to research clubs to see what was available - at the time just touching a boob felt like I was going super-far.
The limited knowledge I have of 70s, 80s, and 90s, SCing, is from all the time I've spent on TUSCL and what others have posted - it seems many SCers were like me in that they didn't experience good-mileage till maybe mid to late 90s either b/c it was not widely-available or they were not aware (probably mostly the former) - yet there are some vets on here that have told stories of wild clubs back in the 70s and 80s but seems those clubs/areas were more of the exception?