Flourgirl... The company I worked for in NY had a soup and salad bar at one time (I don't know if they still do though), but it wasn't free. Sometimes, they offered two choices for a main meal (ex: Spaghetti or fried chicken) or you could get the salad bar. The only thing bad about that was they weighed your salad. With vegies and prepared salads (macaroni, potato, fruit, etc) that added on the cost, big time! I usually got the bare-bones tossed salad (lettuce greens, cheese, croutons, and a maybe sparse vegetables).
After that, they found a local guy to cater the lunches. In the warmer months, he would actually have grilled main entrees (italian sausage hoagies, hotdogs, hamburgers, chicken). In colder months (and it gets COLD in NY state), things like homemade mac-n-cheese or beef stew were the choices.
If you didn't want that, they had a wide array of vending machines that offered canned soups, bottled drinks, packaged sandwiches/salads and even fruit (that was done by the local food distributor).
The company I work for now in WA state doesn't have any of that... just snacks and sodas for the vending machines. I usually bring leftovers from the night before or a soup that I made previous (that was frozen in individual-size containers). We have
2 microwaves 
for the whole company to use to reheat things. I'm a big salad fanatic, and that is my most common lunch, with cottage cheese or fruit (usually an apple or banana) with bottled water. I seldom bring sandwiches, unless they are wrap sandwiches. I love to use burrito-size tortillas for wraps (vegie, tuna, turkey, meatball, etc).
My best advice for you, since you don't want high fat, is to stay out of the vending machines. When you make it yourself, you have an idea of what goes in it. If you love salad, you can get soooooo creative with it, depending on what you like. Pasta salads are also a favorite of mine.
My BF, Mark, is fussy. He usually gets a regular sandwich (tuna, peanut butter and jelly, or some other deli meat with lettuce and tomato). I don't like including tuna or meat sandwiches without lettuce or tomato....seems too blah. With that, I give him a pickle, fruit (grapes, apple or banana), chips or pretzels, something sweet like a cookies (not now, though, as he was just diagnosed with Diabetes--I'm still trying to meet that challenge), and bottled water.
Speaking of wrap sandwiches again, you can make those ahead and freeze them. All you have to do is decide on what the filling is going to be. Microwave your tortilla for 20 secs (depending on the oven), so it's soft. Add your filling, making sure it's not too much. Roll it egg roll-style, and wrap it with either plastic wrap or foil, then put in a freezer bag. Depending on the size of the bag, you can fit a few in one bag. Take it out the night before, and you have a delicious sandwich! If I have something like meatballs or sausage in my wrap... I'll microwave it at work for 1 min, so the cheese melts! YUM!
Anyway, Flourgirl, I didn't mean to ramble on. I tend to do that sometimes. JM had a good post, also!
Coming back to add. I don't know what places you have around you that offer take-out, but most have healthy sandwiches, soups, salad, or even combo-meals. We have ordered chinese and gone to Jack In The Box.... both are not good ideas for low calorie/fat. Check around and see. Most places offer menus to take. Post one at work, so others can order too. In NY, there was someone that always went around with a take-out menu, took orders, gathered money and the business delivered to us. That was great, but it wasn't always healthy. Make it a group thing.... that's always fun!
