Well, I took the question as, and responded as, that wearing more than a t-shirt would be going out of my way under any circumstances. There are certainly circumstances under which I would do it, but they revolve more around social requirements than just going to a restaurant to get food. (I.e. if my grandparents asked me to dress up to go to dinner with them, I would do it, as a show of respect and because going to dinner with my grandparents is something I do very rarely. But going to dinner with friends is something I do a lot, and "my friends happen to want a poncy restauraunt tonight" is not enough, when I can happily go with them to a non-poncy restaurant some other night.)