4square is my go-to restaurant when I am in downtown Little Rock. There are plenty of choices of sandwiches, wraps, & salads - most are fairly simple but good nonetheless. It's run by an Indian family, so some of the sandwiches have Indian influences - and those are the best ones. They've got tons of smoothies and a mango lassi (my favorite!). The atmosphere is a mixed bag depending on what you're looking for - part of it is a tourist shop with lots of Arkansas souvenirs & locally made jams & sauces, as well as imported Indian bags & clothes.
Cons: not a normal restaurant/cafe atmosphere, very slow service when busy