Let see.
I have 20ish games, and they all have coin doors, except for the ones that take the coins on the panel.
About 12 of those machines have the classic "push to reject" buttons, and 11 of them are red, and the other has school bus yellow ones.
Most of my machines take quarters, one takes tokens, one takes dimes, one takes dollar coins, and one that I recently traded (but may be getting back again) takes 100 Yen coins.
It was usually tokens that I remember, but I am certainly NOT equipping 15+ games with token mechs, that would cost a fortune.
I usually try to keep my games on free play though.