[Medieval warfare certainly is a thing! Battles tend to go on longer and have larger pauses when illness rather than injury is the primary killer. There's a reason why Bedivere is decked out in heavy armor, after all.]

I have done that before, for homeowners that needed a payment to allow me to stay for a night. Or even as a 'thank you' for those that allowed me to stay for free. A good breakfast puts everyone in high spirits, I've found.

I think you might be overestimating my smile, though. It sets people at ease, yes, but I don't think most people go looking for it specifically.