(a) Offense defined.--A person is guilty of disorderly conduct if, with intent to cause public inconvenience, annoyance or alarm, or recklessly creating a risk thereof, he:

(b) Grading.--An offense under this section is a misdemeanor of the third degree if the intent of the actor is to cause substantial harm or serious inconvenience, or if he persists in disorderly conduct after reasonable warning or request to desist. Otherwise disorderly conduct is a summary offense.

(c) Definition.--As used in this section the word “public” means affecting or likely to affect persons in a place to which the public or a substantial group has access; among the places included are highways, transport facilities, schools, prisons, apartment houses, places of business or amusement, any neighborhood, or any premises which are open to the public.