For buffets, potlucks, etc., unless you know who cooked what or the event is catered and you can observe food safety measures in place, I only eat things that are served steaming or frozen or have obviously been commercially prepared. I love when individually-wrapped servings are available. I often put a handful of hard candies (individually-wrapped, of course) in my pocket or purse and take my own travel mug along and drink a great deal of black coffee. Coffee is almost always universally available and helps curb my appetite. I also either eat something before I go or take my own food along. If there is a host, I speak with them privately and explain that I have dietary issues and don't want to ruin their party by getting sick from eating something I shouldn't. And finally . . . water. It is rare that I am without a water bottle. I prefer spring water, but will drink filtered water if it is available.