Yeah, I get the different connotations. I wouldn't refer to a kiosk as a restaurant, for example, or a food court. Sure, there may be places to sit nearby, but they're not necessarily for the particular place where you get the food. The lunch kiosk at the library isn't exactly a restaurant, but it could be called one, since it provides soups, sandwiches, small pizzas, hot dogs, squares, muffins, cookies, and an assortment of coffee, tea, juice, and pop. There's chips and chocolate bars for people who just want a quick junk food fix.
For me, lunch there is usually soup, a cookie, and pop or juice (and maybe a sandwich to take home and have later). If I'm there in the morning, I might get a carrot or banana loaf (miniature ones).
I don't really enjoy sit-down restaurants anymore. I'd rather just order over the phone or online, have it delivered, and then I don't need to worry about my "company manners" or what I'm wearing.
For instance, I got an email coupon today for 50% off online pizza orders. I think I'm going to take advantage of that, since one pizza is enough for several meals.