Likely Smit's comedy attempt to do word/number play with Four Play versus John's Roman numeral "IV"....but Smit forgot to add the graemlin because Smit's attempt struck out. ;-)
The actual game name is Player's Choice and model units such as cocktail and bar/table tops were listed as Player's Choice while the upright/cabaret model was marketed as Four Play even though the game it was running was Player's Choice.