Tom Power, thanks for the report
Sometimes the party gets the best of us. I learnt my lesson about threesomes in Sao Paolo when I caugth the free girl trying to steal money. Oftentimes, threesomes are more trouble than they are worth. I usually do them in an control environment (in house) and tend to avoid them when the girls push for it. I still do them, recently in the DR, but only when I have a good feel for the girls and I don't have anything around worth stealing. The best route is a girl you already know and trust who brings along a friend. Also, if you push the issue, as a buddy of mine found out in Peru, the girls will agree to it while not being comfortable with having sex with another chica in the room and it ends up being a dismal performance.
I would avoid the streetwalkers in Santa Fe from now one.