Logging dinner parties, holiday meals, and cafe treats

LittleCulturedPearl

I was invited to a dinner party that will be hosted in the home of my fiance's colleague. She will be cooking the entire meal, and I am wondering how I should go about logging my food! For the past month, I have been able to log meals at restaurants and cafes after noting down the recipes and finding the equivalent dishes on allrecipes.com, which has been incredibly accurate. However, I also tend to choose the simplest meals, and since there is a menu, there is also the availability of choice.
However, at a dinner party, it is expected that you eat what you are served. I have no idea what the cuisine will be like, only that it will be vegetarian (which could be as unhealthy as french fries!) What do you do in this situation? Please help!