Sorta related, I actually remapped the Menu button, P2, in Mamewah to an extra button on my CP. Then when I have kids over, I can disconnect the microswitch under the button so that the kids can't exit out of Mamewah.
Last party I had, the the adults were like, errr, how do I start a game?

Then the kids (10, 11, 12) were pressing buttons randomly and managed to bring up the mame input menus and randomly reprog'd my key mappings! Amazing!!
Impostor