An oxygen bar is an establishment, or part of one, that sells oxygen for recreational use. Individual flavored scents may be added to enhance the experience. The flavors in an oxygen bar come from bubbling oxygen through bottles containing aromatic solutions before it reaches the nostrils: most bars use food-grade particles to produce the scent, but some bars use aroma oils.
Oxygen Bar guests will pay about one U.S. dollar per minute to inhale an increased percentage of oxygen compared to the normal atmospheric content of 20.9% oxygen. This oxygen is produced from the ambient air by an industrial (non-medical) oxygen concentrator and inhaled through a nasal cannula from a few minutes to about 20 minutes.
The machines used by oxygen bars or oxygen vendors are different from the typical medical-issue machine, though customers use the cannula, the rubber tube apparatus that fits around the ears and inserts in the nostrils, to breathe in the oxygen. Customers can enhance their oxygen experience by using aromatherapy scents to be added to the oxygen, such as lavender or mint.
Oxygen also plays a vital role in proper metabolic functions, blood circulation, the assimilation of nutrients, digestion and the elimination of cellular and metabolic wastes. Sufficient oxygen helps the body in its ability to rebuild itself and maintain a strong and healthy immune system. You know how important water, vitamins, minerals and enzymes are to your health and vitality. Although you can actually exist without food for about 40 days, and water for about seven days, without oxygen, life ceases to exist in only minutes. (from: wikipedia)