I completely agree knowing a young lady's name is a very useful piece of information. I understand why most are reluctant to let us know, but nonetheless very valuable in those circumstances.
I have one cover that works in almost every case for me. I do almost all my dating while traveling for work. When I do, I almost always have multiple clients and projects in each city. I just introduce my dinner companion as another of my clients. In my business people understand that asking anything more about my clients is not good form at all.