I arrived from NRT about 1am Sat. I went to SKL and told them I was going on the morning flight to Hong Kong but could not get a boarding pass until the counter opens. He asked me if I was in business class and I said yes. He then asked for a written conformation which I told him I did not have. He then had me get on one of their computers and show him my reservation at united.com.
At that point he said welcome and gave me a tour of the lounge including the sleeping area and showers. I woke up about 3am and there appeared to be only 2 of us in the whole lounge, both sleeping.