They start in the bars about 5 pm! This doesn't mean you could not find one earlier!
You ask the girl you like long term, she will stay with you at least till midday!
if you like her very much and want her to stay a few more days you have to negociate ith her, but always pay the BF for next days!
Be aware some girls do not charge you for the next days! But that is that they expect it from you to pay her!