Good point!

And if you are into oil/gas, Houston. Marijuana, Colorado or Washington. Cars, Detroit (maybe?). Commodities, Chicago. Ag, Kansas City (maybe?). Outdoor experiences, SLC. Building something for Latin America, Miami. Ets, etc.

I imagine there are many other cities that dominate in niches that I'm missing.

St. Louis tends to be one of the best cities for Ag stuff.

For the ignorant, what's AG? Google isn't helping.

Someone should tell Google (hey googlers on here) to add that case to the search engine's special cases, as in: "Did you mean agriculture or (the chemical symbol for) silver [1] or ..." :)

[1] https://en.wikipedia.org/wiki/Silver

Agriculture.

I live in the Detroit suburbs. Can confirm many programmers working for auto companies around here and friends with a few.