333 Silom Road, Silom, Bang Rak, Bangkok 10500, Thailand
That's the Bangkok Bank Head Office. I only needed my lease contract and a certified copy of my passport by my embassy.
Also, at the oficce in Siam Paragon mall, a friend opened the account just with the passport buying some insurance for like 4-5k.
This was my experience a few months ago and one︀ year ago. I do not know if they have changed the requirements since then.