Don't look for any signage anywhere because there isn't any. If you feel lost, ask the friendly host once you enter the Marben and they will direct you to a set of stairs tucked to one side of the restaurant. Expect to walk into a relaxed cozy bar with people congregated around really well made drinks and hiphop blasting in the background. If you can, sit facing the bar to appreciate the passion and expertise of the bartender as he whips up one drink after another with a level of focus and enthusiasm that I don't even put into my day job.
If you don't know what to order, just ask the helpful waiters for a quick recommendation or an indepth education session on a particular liquor you haven't heard of before. I found a new love in bourbon after having the Churchill, it tasted like caramel, smoke and a really good dream.