The O2 Lounge is an Oxygen Bar, Coffee Shop and Internet Cafe located in the high altitude Rocky Mountain town of Breckenridge, Colorado. Our 90% O2 sessions boost blood Oxygen levels, alleviating symptoms such as tiredness, breathlessness, headache, inability to sleep, dizziness, nausea, jet lag and even hangovers. Breathe in The O2 Lounge, rent an O2 machine to take to your hotel or house or buy portable O2 cans to use on the mountain.