That last video is simply amazing. Love the cabs when they're in the dark. Look at how much attention was put into the (black)lighting, the scenery etc.
Not fair to have four of those though

Even less fair to have two R360's in the back !!
Look at how much the kid's are enjoying the game, I wonder how machines like these would do on location today, it might amaze us. (Although it will probably need a ticket dispenser......)
I've played that Chicago Coin Speedway like nuts when I was around 10. These EM machines were (along with the first B/W video games) at the camping site where we used to go on holidays. I pretty much mastered that Speedway and in my memory I knew the pattern from my head and could play "eternally" on it. I always had that game in my mind but didn't know the name nor did I ever see a video of it.
The real problem with (some) EM machines were the limited random-ability. Like that Hill-climber it's just a roll of scenery and you'll learn the pattern pretty quickly. Those games were good for the occasional player but had very little lasting attraction to "hard core" gamers. Still some EM games didn't rely on patterns, like Space Panic or the other "plane on a crane" games.
I love those machines and the technology behind it though. There's a Space Panic for sale locally that looks really good. Space and too many projects waiting prevent me from bidding though...