@flow86 Also, you probably already figured this out, but just about any arcade classic (donkey kong, pac man, frogger, etc) that is a vertical game can be set to fill the screen and played from the vertical ends, and if you configure the cabinet style (with virtual DIP switches using in-mame GUI) to cocktail, you get the screen flipping for player 2. Works a treat. Also, you can do that with some horizontal games that support it. A game like Black Tiger can be setup that way--even though it's horizontal, they only way to enable Player 2 controls separate from P1 is to set it to Cocktail mode and it flips. This is perfect for your cabinet.

Long story short, 4-player gaming is great, but the supported games is a limited list. However, having positions around the perimeter does set you up for some ideal classic gaming. It sure beats viewing vertical games in "pillar-box" style on a horizontal screen.