BBQ people (Bronx, Brooklyn, Queens)

"BBQ people" is rarely used, but it comes from the same time period (1970s) as "bridge and tunnel" people. Perhaps it will be revived, now that there is genuine "Big Apple Barbecue" in town.

28 August 1978, New York magazine, pg. 107, col. 1:
The place has become vastly popular from the sad day of its grand opening, for it is the perfect attraction for tourists and for what certain Manhattan restaurant staffs refer to as BBQ people (Bronx, Brooklyn, and Queens).