I recently went to an oxygen bar. What an interesting experience. If you haven’t done one of these things, its worth the trip to try it. There’s a machine that you plug into that’s got different vials of liquid in it. Each liquid has a different scent in it, like lemon, lime, lavender, etc. The oxygen is pumped through the liquid and into a tube that you stick in your nose. That’s pretty much it. You sit there and hang out and breath the oxygen.
Here’s some pictures of what they look like.
If you’re looking for some kind of euphoria, this is not the thing. I did feel pretty mellowed out after about 10 minutes of breathing in the oxygen, but that was about it. They say that its better subsequent times because you know what to look for (where have I heard that before?).