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by princeofwands 2656 days ago
You do not need 100% accuracy.

Easy data mining: "Religious center" is a top-level category. "Religious school" is a type of "School". "Marijuana Dispensary" is a type of "Shop & Service". "Gay Bar" is a type of "Bar".

More evolved: Find location patterns that correlate with known gay or religious people (for instance by cross-referencing data sources).

https://developer.foursquare.com/docs/resources/categories