I typically bring clothes to change into if I am going into some "sit down" restaurant, so I tend to avoid being turned away due to a "dress code;" not to mention that I am more comfortable in those clothes in that setting than I would be in cycling kit. (cycling kit can be quite cool if you are not actually cycling)
On the flip side, I have to laugh at being allowed to go into the main dining room at the Yellowstone Lodge last August... We had been out camping for 9 days straight, and looked like it, and probably smelled like it. It was our first non-camp breakfast, and it was wonderful. Of course they did seat us in an area where there were few other patrons.
