Actually tandoors (for making both tandoori roti and naan and tandoori chicken, chicken tikka, etc.) became quite common in restaurants in medium to large India

Actually tandoors (for making both tandoori roti and naan and tandoori chicken, chicken tikka, etc.) became quite common in restaurants in medium to large Indian cities some years ago. In fact I used to regret that you could not get the regular plain chapatis and rotis in restaurants (except for cheaper messes or dining halls); it became so that tandoori roti or naan was the only option even in any average or hole-in-the-wall restaurant.