*huggles PM*
I'm completely gluten-free, but do much better on a diet with practically no grains (other than a bit of white rice), ESPECIALLY whole corn, and very little sugar. There are very few places I still go out to eat. Luckily, I don't have to worry too much about minimal amounts of stuff like corn starch.
We used to host a game night with a bunch of my husband's friends. Used to. We quit, as it was getting too expensive to feed everybody and I flat out do not allow gluten in my kitchen, so it was definitely well-known. One of our friends insisted that she could organize one as a potluck. A grand total of 3 people brought stuff, and only one of those people made sure it was something I could eat...and that one person wasn't even the one who organized it. We pretty much realized that most of those people are mooches, not friends.
If I eat wheat, I end up feeling exhausted, freeze, and don't want to eat much for a few days. If I eat whole corn, it pretty much cleans out my system rather quickly. If I eat a lot of other grains and sugars (ie, gluten-free breads, cookies, etc.), my joints start hurting and my circulation goes down. I freeze when it's 75 or below when that happens, no matter how many layers I have on.