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.
That's definitely a hyperbaric chamber.
I did an image search for "hyperbaric chamber" and this place popped up in the first few results, and whatever chamber they're using looks very similar to that one, so it's likely from the same manufacturer https://www.facialplasticsurgeryofaustin.com/about/our-on-site-hyperbaric-oxygen-treatment/
Edit: specifically that's apparently a hyperbaric oxygen therapy or HBOT chamber