I and my wife decided to give this place a second chance yesterday. Like last time around, when asking to see the drink list you are told that it does not exist, leaving them free to invent their own prices when you pay. And they will. Asked the waitress for the price before we ordered, had 2 drinks each, and upon paying were presented with totally different prices. When pointing this out they told us we were wrong and increased the price even more.
First time around, about one year ago, we were served Kilkenny gone sour. One of the regulars asking to try it agreed that it was not fresh at all. The young girls behind the counter, however, couldn't find anything wrong with it. Just paid up and left.
Service is not great. Staff seems uninspired, sitting in a group behind the counter most of the time. You have to struggle to get their attention. Waitress also got our order wrong.
The few other guests there, both times, seemed to be sexpats having a drink before heading to nearby Soi Cowboy.
Cannot recommend the black Swan to anyone. Will never return.