Hmmm, that domestic Pacific Club Salones lounge looks different than when I went there in early August. Looks more spacious then when I went and the entrance looks different. If I recall correctly, it used to be located down the elevators and behind it. I remember seeing red and orange seats with an ugly yellow painted wall too so I'm curious if they moved locations recently. My flight from MEX - SCL landed around 5AM, dealt with the horrible terminal connection there (and getting hounded by all the scam taxi drivers Santiago Airport is known for), then interacted with women who attempted to deceive and steal my money at the only sim card shop that was open that early in the morning. Yea, Santiago Airport is my least favorite airport I've ever been to and it's a shame because otherwise Chile is fantastic.
I got to the domestic lounge around 6:30; every seat except one around a corner was occupied with people (80% of the lounge had people sleeping with blankets, etc., understandable since it was so early) and I definitely saw people put their legs up on tables, etc. so I'm not surprised to see that signage. 100% no-frills lounge, but like Lucky said, almost everything in Santiago Airport is closed early in the morning (a couple of food options are open for breakfast) so this was the best option; this lounge definitely looks 10x better than what I experienced.