I've read about tourists who go to Kyoto to get made up to look like geisha or maiko. Over half a million a year according to Foreign correspondent, and mostly Japanese, based on some makeover houses lacking English language support.
Where and when is the best time to photograph fake geisha/maiko? Criteria include likelihood of finding such individuals, having a photogenic background, and being in a location where they're more likely to agree to be photographed. A time and place where real geisha don't frequent is also good, but this article indicates when the real ones are active.
There's also women who are paid to dress up as maiko to pose with tourists. That's not what I'm after either.