I started to learn English thanks to Tycoon titles, specially Transport Tycoon. You will never learn what "iron" or "copper" mean around here, as the public English education is a façade for politicians and there's very few people who actually teach the Language instead of teaching you how to pass exams. I'm pretty sure that my parents choice to get me a good teacher was helped by my advances on those games.
All those economic games also taught me a lot of geography and history. I don't think I would know anything about Africa were it not for trying to build the Transafrican railway. And I would have never heard about the Hansetic league had I not played Patrician II and it's sequels.
As it also can be expected those games also taught me a lot about how the economy works, what it means to take a loan, how to control your expenses, saving for accidents and other important basic lessons. I think those games are a very useful way to teach kids basic economic concepts.
When a friend of mine and I decided to cosplay as the Cheerleaders from Ouendan and practise a dance/cheer taken from the game little we knew about the popularity we would have. Our cosplay was insanely popular and we met lots of interesting people. It really got us into the scene. I screwed up when we were on the scenery tough

I blame my friend because he said we were ready and didn't want to practise more xD
Dance Dance Revolution and, later on, Pump it Up were key in meeting a lot of new people, two very important friends were made thanks to that game and gathering to play it still remains an ocasional social event for my social circles. It also made me do some excersice while enjoying it something I would have never expected.
There are other influences but I don't feel like writting more today
