One of my friend is a regular in billboard, he went there for many years already but occasionally he got messy bill problem too and when it's too complicated to solve it then he will pay it since he like to go back to that place again(it's always the new waitress or new girl that cause problem). So it's up to everyone's decision when girls order drink without your permission.
Nowadays a lot of bar has the bill ready for you to sign when the drink comes like crazy house, so those bar save us a lot of trouble lol...