I too would like to do such experiments some day and I think if you frame it the right way you can pull something out of it. To start with, you could set yourself apart from the regular run-down cabbie if you are dressed up well. Secondly, you could make some BS story about not being a cabbie but being a analyst/researcher/entrepreneur who's doing this for market research purposes and understanding the psyche of the consumers and the whole taxi system as you're planning to build a couple of businesses around it. This is bound to intrigue any woman, or just any person for that matter. From that point on you could run your game..
Game is a necessary evil