Just treat it as a shit test and pay no attention to it, in fact I think you did pretty good with just shrugging it off.
For next time, I suggest using an observational opener (pretty much a situational) assuming it's a cold approach and she doesn't see you coming you can think of something witty to open with. If you've already met eyes and you're still an AFC you may want to MAKE some funny openers before going out. I think it's better than canned material, just be sure that it won't make you crash and burn from the start. Look at canned material that works and evaluate what makes it work and go with that mentality when creating something. I'm not saying restrict your mind from experimenting, but you get what I mean.
And if you crash and burn, who cares?
You're still working on getting over approach anxiety, and every approach is a learning experience so don't sweat it.
The worst that can happen is you go back to the drawing board and draw up a better plan, which you would have ended up doing anyway durig your debrief at the end of the night.
_________________
Yes, my name really is Ray Casanova
"With ignorance and arrogance, success is assured."