The Buenos Aires Star Alliance Lounge is of a good size, in the form of one large rectangular room. As far as I could tell, it was mostly tables and chairs, and no real different areas. They have slightly more interesting food options than the AMEX Centurion Lounge.
As part of my award business class ticket on Turkish Airlines, I was granted access to the Buenos Aires Star Alliance Lounge. When I was there in the evening, they were pretty busy. I was pretty lucky to score a seat, and it didn’t take long for someone to take my spot the moment I vacated it.
I wouldn’t say the quality of their food was better than the AMEX Centurion Lounge, but it was more to my taste. They had a pasta dish, and they also had a fried vegetable fritter. I do have a need for one hot option during the day.
Overall, it’s a solid airport lounge with decent food options. They did get pretty busy during my visit. It might be more pleasant if there wasn’t such a space crunch.