[x_plus_one]

A denizen is a resident with rights intermediate between those of a citizen and those of a resident alien; in particular:

* by denization, an obsolete process in English Common Law, dating from the 13th century, by which a foreigner gained some privileges of a British subject, including the right to hold English land, through letters patent

* a "free Negro" in the United States before the abolition of slavery

http://en.wikipedia.org/wiki/Denizen

I guess it's all good....

[MaggieCarta]

The writer is doubtless using “Denizen” as a noun in either the first or second most common definition. Personally, I would have preferred being called an “habitué”.
From Dictionary.com:
1. an inhabitant; resident.
2. a person who regularly frequents a place; habitué: the denizens of a local bar.
3. British. an alien admitted to residence and to certain rights of citizenship in a country.
4. anything adapted to a new place, condition, etc., as an animal or plant not indigenous to a place but successfully naturalized.