I think this is an issue that many chapters face, including my own.
My GLO also has strict rules regarding the issue, and we try very hard to abide by them. We are taught as new members to respect our letters and our heritage, and I believe this is why we do not have a problem like this. However, it was very wrong of "Julie" to go behind the president's decision and order the glasses anyway. If she were supposed to be making these decisions, she would be president. Many girls in my chapter think that a lot of the rules are anal, but at the same time we respect them. At our formals we give out favors to everyone, and this would definetely be in violation of our rules. It doesn't matter what is being put in the glass, a person who is not a member of our organization is not allowed to drink from that glass. The biggest issue I have is that this girl went behind the president's back, who has the upmost authority. This causes even bigger problems than glasses if the behavior is allowed to continue.