"In New York" vs. "At York": Getting the Preposition Right

Correct: "I have a meeting in New York."

Cities, states, countries, continents, and large regions take in: in New York, in London, in Japan, in California, in Europe.
"At" is for specific points: at the Empire State Building, at 123 Main St., at JFK Airport, at the corner of 5th and 42nd.

York, UK: "In York" (city). "At York" only if referring to a specific venue (e.g., "at York Minster").
York, PA / York, ME / etc.: "In York."
New York: Never "at New York" unless you mean "at New York University" or similar institution.

Can you put a building after it? → "at."
Is it a geopolitical container? → "in."

So: in New York for the city/state. At the coffee shop in New York.

New Zealand