Even if they don't offer the nutritional information, you can still make wise choices based on knowledge of food. For example, I will order salmon at a restaurant over a steak because I know it's healthier. Many of the CS restaurants offer some type of healthier option. For example, Columbia Harbor House offers a humus, broccoli slaw, and tomato sandwich on whole grain. I know that's far healthier than the fried fish basket with fries that they also serve. You can also get carrot sticks, grapes, apple slices, etc. instead of the fries at many of the CS places. I know that's not a perfect way of choosing what you eat, but you can still make wise choices.
If it helps, you can go to allears.net and look at their menus beforehand. it will give you an idea of what the various restaurants serve so that you can choose a place that offers healthier options.