I was staying at Red Rock Resort on business and had a free night. Met up with a couple new best friends, ladies attending the same trade show, and we discovered this gorgeous space in the center of the casino. While it's in the middle of the casino, it's sufficiently walled off to feel like it's own club/lounge. The incredible crystal centerpiece makes this more upscale than just a bar.
Ladies night meant free drinks till midnight. Umm, what could I possibly complain about? Not a thing.