All I know is what was posted by her.
When she posted that picture, she said something along the lines of "**** this night!." She didn't respond or comment again in the some 100 comments and has since deleted that status from her Facebook. I guess the comments were becoming a train wreck. Don't blame her.
I think it's fair to assume by her "**** this night!" status with said picture of the no tip receipt that she was stiffed and stiffed hard. But that's like, my opinion man.