Back in the mid 80's (85-86 I'm thinking), the Electric Slide came into the big time as a cult thing at colleges. Since we were surrounded by colleges, my future wife and I used to hit all the college clubs. So we go to this club in Poughkeepsie one weekend, and the DJ put the song on.
I didn't recall ever having heard it before. The entire room jumped into the dance floor (this was a huge club), and proceeded to wow the hell outta me. It's like they had been practicing it for years. They were like in perfect time!
I found the record soon thereafter and started using and teaching it. That was a good money maker, and fun dance -- people would go to certain clubs because they played it a couple times a night.