Most street fairs should be okay as they are public, as long as you are not charging for photos without a permit. Most State Fairs have code of conduct rules against covering your face. County fairs may be more forgiving but I would expect resistance. Malls may be okay as long as you are not advertising for commercial purposes and it is non-disruptive.
If you know your location - check the web for their code of conduct.
If you know your location - check the web for their code of conduct.