Hiking and cycling communities tend to be quite friendly. I cycled Europe quite a lot, and have met many similar minded people. Long distance hikes are a good

Hiking and cycling communities tend to be quite friendly. I cycled Europe quite a lot, and have met many similar minded people. Long distance hikes are a good way to meet cool people too. Europe is full of them, and the longer hikes mean you get to meet and make friends with people for a few days. For bigger cities, free walking tours are both fun and a socializing place.