Eating out paleo is rough. If you do much paleo you have already figured that out.
I have run the gamut. From tossing 3/4 of my meal out to having to get a manager involved to get pan fried unbreaded fish on a bed of romaine with mayo.
Fast food is a joke,. While it is barely possible to get something not toxic in a fast food establishment, it really isn't very compatible with the reasons to eat out. (Paleo fast food is stupid easy to pack. Fast food chains serve no need when you can carry a bag of jerky and cheese and salami around with some fresh cucumber.)Diners, while a bit easier, fare poorly for people on paleo or real food diets. For so called "market" reasons, the ingredient lists plainly suck. Corn, wheat, and soy products are in every sauce and dressing. And don't even try to find oilive oil and vinegar. I have worked in and operated restaurants. The market and cost issues are pretty bad, but I think there might be another answer. Let's forget paleo for a moment. Anywhere honest food is served, it is possible to eat paleo with a little explanation. Let's look at honest food. To keep food honest, you have to work with variable seasons and supplies. Which means set, plastic coated, everything the same across the country menus won't work. The answer, in case you missed the post title, is the Inn. The classic romanticized public house style inn. Big pots of chili or soup- not from a menu, but whatever is being made today. Cuts of meat from a locally butchered animal, possibly quarter steer roasts. The list can go on, with local produce, regional harvests like seafood. Fast food? Well, much of the daily menu is already ready already. Menu? Daily, on a chalkboard. Food costs? If you aren't reliant on the manufactured food industry to maintain a set menu, you can work you food costs using seasonal, local/revional, food. At lower cost.