it's former Robinson location on the corner of Rama and Silom. Used to be famous for it's " Robinson boys " congregating on the steps and hoping to land a customer for the night or next hour.
as for smoke, unfortunately some bars still allow it, certainly GoodBoys (former Screwboys )allowed it last time I was there 2 weeks ago and so did Banana Club where one of the smokers was super handsome young farang who even bothered to smile at me , at the time flanked by two boys , one to the right and another one to the left