Walking by this beachfront billionaire house, the garage was open & I saw this. This chamber has a bench in it for seating maybe 2 people max. Oxygen chamber perhaps?

I regret not getting clearer pictures to zoom in and see the words on the instruments but I felt the need to be discreet as I was just walking by, these ocean-front home garages are rarely/NEVER left open unattended. What is this mystery chamber?

One more different angle picture in the comments, you can see the seating bench in the chamber.