Dear Usaiyer sir, there are two places in Chennai that I am aware of. Ramana Kendra in Mylapore and Ramanalayam in Chrompet. I don’t know whether they are still functioning so you will have to check. There used to be a Ramana-Krishnamurti centre but I think it closed few years ago. I have not been to any of them except once to the Chrompet place. I come to know of these places from others.