Wilton Manors, Florida has the highest per capita population. Note though that the entire city population is less than 13,000 persons, so it is a small enclave to Fort Lauderdale.
Real Answer
Since there haven't been any studies done, I wonder how the previous answerer came to that conclusion.
San Francisco has the most gay people per capita than any other US city. Metro Areas with the Largest and Smallest Gay Populations
Auckland city in New Zealand has the most boats per capita
auckland, new zealand
It is difficult to determine the exact city with the most rats per capita as this can vary depending on different factors such as population density, waste management practices, and climate conditions. However, some cities known for having high rat populations include New York City, Chicago, and Washington, D.C.
Compton?
Lafayette
Valdez
Lawrence Kansas
Auburn
Paris
Boston
Miami
Kansas City