I like to eat out but what's on the menu often doesn't suit me for diet, dietary, allergy reasons. And if I'm with a group, I don't want to leave.
So I've found that I can ask to have something cooked the way I want it, and usually I can have that done. I've only had one restaurant that refused, and that's b/c everything they had was "pre-"done.
So, white wine instead of butter for baking fish, chicken grilled not fried, dressing on the side of salad, veggie substitutes, etc., etc.
What's the most unusual "my carte" item you've requested that's been honored by the restaurant?