Me and a friend managed to find an old pong machine being sold by some toothless Assyrian crackhead out of his garage, and picked it up for dirt cheap. It was some funky variant titled "Flim-Flam", with paddles you could move in all directions and a "Flim-Flam" button to put English on the ball. We spent the night fixing it up (though, surprisingly, it was still in decent working condition) and playing it, getting really damn good to the point where most games were decided by a single point. It was incredibly fun.
On the topic still of 70s arcade experiences, we later got a chance to play some 70s Atari pinball tables at a convention, and they were simply sublime. They played slowly and smoothly, with the ball making these awesome floaty curves across wide playfields coated in amazing artwork. Each table had several sets of flippers controlled by either button, and they were just a joy to play. I played so many amazing games at that convention, but of the 70s stuff I played that was definitely a standout moment. I also finally got a chance to play real Crazy Climber and Jungle Hunt machines, which were games I loved as a kid but never got to fully experience.
Thank you for this thread, I love being able to talk about these fantastic games. There's just something to them, so intangibly magical and purely fun.