Lisbon. Joined by accident (wrong bar), stayed for the people. Serious question under the story: how do you find collaborators without the awkward co-founder-dating ritual?
What worked for me: working in public at the meetup (laptop open, problem visible, help accepted), small paid trials (20 hours, fixed price, both sides can walk), and the forum (three collaborators found in threads, zero found in DMs).
Co-founder dating is interviews. Collaboration is rehearsal. Rehearse (paid trials, small projects, ship something tiny together) before marrying (equity, vesting, lawyers). The tiny shipped thing predicts everything.