So i went out last night to a bar with some friends and met 2 new women through these friends. We all went to the same college but had never been introduced properly.

Had some banterous chat with the two of them and was beginning to get a few IOIs, I didn't hang about however, I kept busy and just met loads of people and had a lot to drink. I want to message one of them on facebook, and talk her into going on a date with me.

What should I say? What has worked for you in the past via facebook? We have about 40 mutual friends.

TL;DR: An affective way to get a date through facebook messaging when that is the only way of contact with someone you met at a bar the night before