Oxygen, aromatherapy and a massage create a fresh-air experience in an unlikely place: the Mall of America.. In Short The decor, evoking blue skies and dreamy clouds, creates a fitting atmosphere at this oxygen bar. Harried shoppers and casual passers-by stop in and try varieties such as rosemary-mint, Hawaiian ginger and beach-scented oxygn, all reported to increase energy, aid memory and even ease hangovers. Each session starts in a reclining massage chair, where patrons breathe an oxygen-and-aromatherapy mixture for 15 minutes. Then the action moves to the bar for five more minutes of oxygen.