Translation of raffinieren

Officials say that the trip will start after lunch at around 1pm, next to the Phoenix Hall at Lili's college in Boston. During the departure of these twenty five crazy kids, major roads will be closed.
It seemed like a very cute settlement and a great place to stay in for a night or two and I hoped that they would have rooms. However, since I wasn't sure I decided to carry my backpack with me.
Usually I do not care too much about not getting change, but when you pay a 3 dollar ride with 50 dollars, you do actually expect change. We stood there for a while and neither of us knew what to do.