I love the tinder API. A few years ago I was planing to shift to another locality in my city but couldn't figure out where. I eventually decided to move to an area with the best looking women. Used the python tinder API to move around the whole city with GPS coordinates while setting the shortest possible radius and saved profile pictures tagging them with geo location. The end result was a database of geolocation mapped to profile pictures of women in that area.
BRB: Going to pitch some real estate agents with an automated system to add Tinder women with super hot profile pics tightly geolocated to their realestate listings...