"Activity" shall mean any meeting, assembly, block party, or parade.
"Block party" shall mean a planned or organized event which uses a specified portion of any public street for the purpose of celebrating a special event or holiday and which is organized by and for the residents of a specified street or streets or a specified neighborhood.
"Parade" shall mean a march or procession of any kind.
"Public meeting" or "assembly" shall mean a planned or organized gathering of a group of persons, or any ceremony, show, exhibition, or pageant which may reasonably be expected to result in the gathering of a group of persons, upon any public street, park or other public grounds.