do you already know that you have game or know that most likely she won't turn you down?
my key chain has one of those mini rubik's cube on there so i always have game with me. those things are so useful when you're in line or something. just take it out and play. sometimes a woman would be like...oh, what's that you're doing? and i would be like... oh, it's a mini rubik's cube.
they can be a great conversation starter.