Only have room for one, but it will be right next to my D&B card reader!!!!11!1
Don't be a ---Bad words, bad words, whatcha gonna do? Whatcha gonna do when saint censors you?---, build an extra box on the side. just screw it on and use a hole saw to make a hole for the wires like you did on your Two-Headed beast. Make sure the box is big enough so people can see it there and its not a hazard they'll run into, and also so it can hold the EXTRA LARGE rolls of tickets. Maybe for modern day authenticity add another box on the other side for a bill collector. You know, so its nice and symmetrical.
There's way too many mahjong roms in MAME to leave these off.

Thats a GREAT idea! Wait, aren't there multi player mahjong games? people aren't going to want to take turns, they should each have their own set of buttons for that.
...and they should light up with RGB LED's
