Behold, my ultimate wet dream: Pac-Man, Ms Pac-Man, Donkey Kong, Donkey Kong Jr, Galaxian, Galaga, Zaxxon, Pengo, Frogger, 1942, 1943, Phoenix, Time Pilot, Bomb Jack, Arkanoid and even Burger Time - 48 classic games inside a beautiful Lego arcade cabinet.
The Lego arcade cabinet doesn't use MAME on a PC. Instead, it has a Jamma board inside. The Jamma allows you to easily pick any classic arcade ROM from a library of 48 games. It is now discontinued, but if you are looking to build something similar, there's a 60-in-1 model available for just $US160