Do You Want to Start a Tab?

Story One - A group of friends are out at a bar and woman orders a drink and some food. The bartender leaves their open beer at a different table before bringing it over to them. The males ask for a new beer because it could have been spiked.  The bartender refuses.

Story Two - A woman is out with some co-workers and a random male asks several different times if he can buy her a drink.  After many attempts she orders a double shot.