The details in paragraph 17 help the reader infer that-

Paragraph 17

Of course, there's the obvious answer that sitting right across the Schuylkill is Bridgeport, where he was born. Yet there are other theories. Some say he just got tired of running. Some say it was the butterscotch Krimpets. And some say he only intended to pause here but that he stayed because he was so happy to make a friend.

From this paragraph, we can infer that Maniac had no friends.... the Two Mills was for Maniac..... a place he found inviting and wanted to stay.