A vote for worst: VN's domestic lounge at SGN. It's laughable... depressing neon lights, crappy packaged snacks, stained and worn furniture, dirty and smelly bathrooms, and attendants that are clueless. You throw in clientele who think they run the place (designated VIPs are also sent to this lounge) and a smoking room where they not only not close the doors, but actively OPEN them when someone (read: me) tries to close them, and you have a pretty terrible embarrasment. of a lounge.
It's truly a lounge where I'm not quite sure one goes to because it's better than the main passenger terminal. It's a toss-up, at best.