Or you could just get out of your house naked, without any money, and start riding your tall bike outside the city and asking for help. A french dude just filmed himself doing that a few years ago.
Joke aside, you don't even have to be nude or ride an eccentric bike. Touring without a motorized vehicle and asking for directions/food/shelter is a great way to start conversations and meet new people. And you don't need to go very far. If you are doing that walking you can meet and get new friends easily in a relatively close radius.
Pro tip a friend let me in on: carry a guitar with you. Good if you can play it a little. If you are a man it makes you seem less threatening. People tend to be more open and friendly.
Joke aside, you don't even have to be nude or ride an eccentric bike. Touring without a motorized vehicle and asking for directions/food/shelter is a great way to start conversations and meet new people. And you don't need to go very far. If you are doing that walking you can meet and get new friends easily in a relatively close radius.