I have to say I can understand her reluctance. It is unfortunate that it takes alcohol to bring out that side of her personality. it is possible that you could have a planted person at the bar to approach her and get the party started. If there is a male or female you can confide in with your ambitions and they approve of being involved that may be a way to move forward.
YET I caution you that you need to consider the morning after. What seems like all fun and games on that alcohol driven night may seem a bit different when you two have that next morning talk. There is the chance that she may approve but if she has regrets be sure to install seat belts to the chair at the breakfast table because you are going for a ride. I guess what i am trying to say is there can be a plan but be sure to weigh the positives against the negatives.