I've taken a girl to a kebab shop on a first date.
I probably wouldn't bother going to a chain like Nando's, because it's **** food and has a **** atmosphere, and if I was going to actually make the effort of going somewhere I'd pick a proper restaurant. But I don't think there's anything wrong with going somewhere cheap, which seems to be the theme of the thread. Half the restaurants I go to are comparable to Nando's on price, but just have far less annoying children in them, and nicer food.