I live in Middletown, which is where Clerks is filmed (Leonardo is a boro of middletown)
So it was really cool when they actually showed middletown throughout the movie.
In the beginning, the fire scene, that was MTFD station 2 Brevrent park, I know some of those guys, they are real firefighters and such.
I know where quickmart is located and have been there.
I have been to the mcdonalds, wendys, pizza hut, and the giant clown in the beginning of the movie.
Leonardo is barely a square mile big, hence, it does not have it's own police station, or anything of the sort. The only parts in the movie actually filmed in Leonardo were the beginning and end.
But if you wanna visit i'd gladly tell you where everything is.