I think this is called "Mat #1". This mat is where the beginners (white belts) train. No-gi also happens on these mats. I have never trained on Mat #1 because when I switched over to ATOS, I was already a purple belt. I also don't do much no-gi at the moment. :/
This is "Mat #2" (not sure if I switched the numbering). I basically attend the Advanced Gi class and have only trained on these mats. When people from the restaurants near by took cigarette breaks, smoke would come in here and make the quality of air crappy. I hope we don't have that experience at the new school.
Goodbye old ATOS HQ location!