I remember walking into a small magic shop on Hollywood Blvd running into Lou Lancaster. Lou was in a mood and got to talking about Three Card Monte. He started showing me variations and for about 40 minutes went through more versions of Monte than I knew existed including doing a switch with a licked stamp on the card.
Jay Ose was quite good at Monte and had a nice routine worked out that he did at the Magic Castle in the early days. He had a nice way of doing the bent corner where the spectator thought he'd caught him out but Jay just picked up the card and made said something to the effect of "Mmmm, how did this corner get bent?" as he straighted it out. He would then reveal that it wasn't the card that it was supposed to be.
The way he did it allowed everyone in on the joke and didn't make any particular individual into a sucker. Jay's presentation made it a charming effect.
Someone familiar with his full presentation should write it up as it was quite commercial.