After the Singapore Airlines lounge, I went to the Thai lounge, which is the only Star Alliance lounge I hadn’t yet visited (the other being the United lounge).
This lounge is located in the same area as a lot of the other lounges, so it’s easy to lounge hop. It’s open to the terminal like the United lounge. There’s also a separate first class section, but it’s very, very similar to the business class section. The furniture is marginally nicer, and it’s of course a bit less crowded, but you’re not missing out on much if you only have access to the business class side.
This lounge features some game stations and massage chairs. I’m not a huge gamer, but I’m a pretty big fan of massage chairs, so I pretty much just camped out on a chair for most of the time that I was in the lounge. They’re definitely a little worse for the wear, but I still enjoyed my chair massage.
For food options, there was a pretty wide selection including various Thai foods and ice cream bars, but I wasn’t that hungry after eating some in the Singapore lounge, and it didn’t look all that appetizing to me personally.
The one thing that I didn’t like about this lounge was the internet access. I could not get the wifi to work, which is a basic necessity of an airport lounge. It didn’t matter a ton as I just used the Hong Kong airport free wifi, but it drives me crazy when the wifi doesn’t work in a lounge.
Of all the Star Alliance lounges at HKG, I don’t think there’s one that’s clearly superior to the others. Some people will like the food at the Thai lounge better, some will like Singapore’s food better (I don’t think anyone would choose United); some will find the lack of bathroom at the Singapore lounge to be a dealbreaker; some (like myself) will love the massage chair at the Thai lounge. You’re not missing out on much by not going to any given lounge, so I’d probably just go to the lounge that’s most convenient.