I remember the first time I heard about it was the late 90s at some get together my wife and I went to. There was some friend of a friend that was all excited and telling me about MAME and ROMs. At the time I had no interest in video gaming whatsoever but I thought it would be cool to play Galaga. So probably that night I went searching for an emulator pretty sure it was MAMEUI32 and then after trial and error figured out how all this stuff is supposed to work.
It didn't get me back into retrogaming though to be honest as from the early to mid 2000s I was more into computers and networking and I was spending time with kids and what not. It wasn't until December of 2008 when I saw the movie Chasing Ghosts by chance one night on Showtime that I found out that retrogaming was a thing.
Then in the summer of 2009 I built my first MAME cabinet. I didn't want to sodomize that cabinet with a trackball so I built another MAME cabinet out of a gutted Centipede to play trackball games. Then I built a Pole Position II cabinet. And I had yet another MAME cabinet plus I added dedicated games like Monaco GP, Mr. Do!, Missile Command, Cosmic Alien and a few others.
I sold all that stuff by last summer and populated my small game room with pinball machines instead. I bought a Raspberry Pi and now I play MAME and other emulated consoles with RetroPie while I sit my fat ass in the recliner with a Xbox 360 controller off the big screen. Much more pleasant gaming experience than standing at an arcade cabinet. And as a result has renewed my interest in video gaming as I've been spending a lot of time the last 4 years playing pinball.