Yes, I totally agree with all the other posts above; this sort of thing could finish a pub which is struggling. I very much doubt if they have got a tab to run op, as how many pubs give credit?
Do you know the name of this girl who works behind the bar?
I would be given the sack as a bus driver if I gave any of my friends free rides in the bus. This can be awkward if all my friends are in a football team, and they all get on at the same time.
You should tell the landlady in writing, or by email, as soon as you can. I email any pub I see with a spelling mistake in their sign, by saying "I hope your food and beer is better than your spelling".