If you meet someone who you want to stay in touch with, you might want to create a fun calling card that you can leave with them.
Don't give them a traditional business card that makes the entire date seem more like a job interview than a dating prospect. Girls can give guys a name and number with a photo on the card so they remember who you are.
Keep it fun and you will find more success on your speed dating endeavors.
Ask how they feel about having a GPS chip inserted into their neck.