I read here that oxygen bars were started in Japan in the 1950s to revive policemen who passed out due to long hours in the street. Interesting. I know they are huge now. That and laying on hot slabs of rock (that's another blog entirely).
Here's a demonstation.
The funny thing is just last week J and I watched Little Shop of Horrors. He had never seen it before. After we took turns inhaling copious amounts of our green tea flavored oxygen (Do you feel anything? No. Do YOU feel anything?), we kinda had a moment where I suppose we both remembered Steve Martin in one of his more memorable roles. I had to explain, "No, no, nitrous oxide, totally different stuff!"
Now, if they had N2O bars...