Panera - Black bean soup with veggie sandwich on whole grain, no cheese, apple as a side.
Chipotle - Veg salad - lettuce, black beans, grilled peppers, chopped tomatoes, corn salsa, red salsa and a dab of guacamole (either scrape off extra or ask for it as a side)
Sit down places - I usually don't go to chains when I go out to eat as I don't care for most chains too much. Although with coworkers/family, I sometimes go.
Soup Plantation - When I go to California, I make as many stops at this place as I can. Last time, in a week, we went 3 times. It is the same chain as Sweet Tomatoes. I basically load up a salad, no dressing and a piece of sourdough bread. I might try a bit of their veggie soup too.
Red Robin - It depends how I'm feeling but one good thing is their lettuce wrap veggie burger, no cheese, no mayo with salad on the side. If I'm feeling it, I may have their veg burger on their whole grain bread. You can also add anything to the veg burger that is offered on their menu so sometimes I'd add guacamole, grilled onions or something else.
Ruby Tuesday - Now this isn't a restaurant I really appreciated until the last few months. There is really only one thing on their menu I can have which is their veggie burger. Last time I went, I thought about having a veggie burger with the salad as a side. Instead, I just had salad and was happy with that.
Sushi - I love vegetable sushi. I usually buy it to go though at either Whole Foods or a local Korean market that has a sushi chef on site. Its about half price at the Korean market.
Chinese - I'm blessed with great chinese restaurants. If I want to pack on the calories, I'll go to the really authentic one as anything seems to go there
Normally, I get dishes that aren't fried, aren't too saucy and mix in some steamed veggies. I have a vegetarian chinese restaurant that makes wheat gluten products which are really good but also has a variety of dishes.
Thai - I'll avoid the curry unless I'm ready for something a bit caloric, the coconut milk packs on calories quickly. So stir fried veggies with tofu, steamed veggies with tofu, etc. It depends on the menu. I'll usually pass on the rice.
Indian - Sadly, I avoid Indian food these days for the most part because they do like to sneak in butter (ghee) and yogurt into their dishes. If I have decent confidence I can avoid either, I'll gladly go because they have awesome dishes such as lentils and chickpeas in spicy sauces. Curried vegetables (no sauce) are good as well.
Other - Honestly, my diet naturally cuts out a lot of calories if I keep strictly to it. I also don't get a lot of choices in restaurants but the choices I generally get are lower in calorie than the average dish. Unless I go to a vegetarian/vegan place, then the calories can range from very low to very high with lots of options. I've basically just learned to navigate restaurants.