do you have her phone number already?
if so i would shoot her a text and be like "the other night was fun. we should def do it again sometime, but minimize the crowd around us
" see how she reacts to something like that. be playful about it.
but dont bring up the failed night. if you return to the shoulda woulda coulda didnt then both of you will over think it and it will never happen. pretend like thats how you wanted it to be. as if you didnt NEED to hookup with her that night. because you know tghere will be a better oppurtunity to come.
good luck my friend.
-GL