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Game Tree
The Board Gamer:
Game Tree is an app available on IoS and Android. It seems to be more popular with video gamers than tabletop gamers, but it did find some baord gamers within 50km of me when I did a local search.
As part of setting up the app, you tell it what type of games you like. Then it tries to match you up with people who like the same kind of games that you do.