Yeah i second nova on the whole using her as social proof thing.
Maybe next time you come up with this situation try to play with it a little...
Have some fun trying to make the one your interest in jealous if you have built any level of attraction...

You've just gotta take the mind set that you have nothing to loose... if the drunk goes then atleast your clear to re-open, if the blonde doesn't get jealous then she's just gonna return to her friends and you can come back. But if she does get jealous... then your in for some fun...

I'm fairly new but thats how i would play it...

.db x.