I'm honestly a little confused by the motives of the participants in tonight's scam, so I turn to the commentariat for insight on who was doing what and how I could have acted differently.
Background
Budapest Honeypot Scam

A well-known scam in Budapest, Hungary is that a girl or girls, ideally pretty, comes up to a guy or guys, flirts with them, convinces them to go to a bar, orders drinks, and then the bill is outrageous.