No, I haven't been. Still, if my T and I were at something like that we would probably have rules about our interacting. She would hopefully maintain her boundaries. Do you already know that your new T has the same interests/religion/hobbies as you do? Maybe you're worrying about something that may never even happen. It reminds me of my thread about my friend's T's party. It's not a good idea to even be at something intimate with your T, in my opinion.