How to make friends in Jakarta as a foreigner, expat, or new student (English thread)

Jakarta is one of the friendliest cities on earth and one of the hardest to find a circle in: the distances are real, the traffic decides your social life, and most expat advice stops at "join a gym". The honest playbook from people who cracked it: pick ONE anchor neighbourhood and go deep instead of chasing events across the city (a weekly thing within 20 minutes beats a great thing across town). Learn 20 words of Bahasa; the warmth you get back is out of all proportion. Say yes to office invitations, especially the ones that feel too local for you; that is where the real city opens. And the pattern under all of it: repetition beats charisma. The same faces, the same night, a few weeks running, and Jakarta becomes a different city. English or Bahasa both welcome below: what actually worked for you here, and what is overrated?