Oh yeah. Ninja Warriors was friggin' huge. They had that at the local 'cade when I was in 3rd grade. It's almost funny how much hardware was used on such a simple game, but I guess you can say the same about X-Men. One thing about it, though, a 2-player X-Men cab just doesn't cut it after you spend most of your time on the game using a 6-player cab.
I now realize how truly awesome my old arcade was. They had all the good ones. Motion versions of classics like Galaxy Force II, After Burner II, G-Loc, Radmobile...big games like Ninja Warriors, X-Men, and towards the end they had the massive Galaxian 3. On top of all that, I got my first taste of Discs of Tron there, and it was the environmental version. *drools*
God, do I ever miss real arcades.